May be you can use a simple app script which can convert CSV's online into Google Spreadsheets? Here is a post that I wrote sometime back.

Pull CSV data from URL to Google Spreadsheet
I am working on a custom Magento extension.
I am working around the Adminhtml part and i've created a custom form there. 

Here is the form code:

&lt;?php

class VivasIndustries_SmsNotification_Block_Adminhtml_Sms_Sendmass_Edit_Form extends Mage_Adminhtml_Block_Widget_Form
    {

        public function _prepareLayout() 
           {
              $ExtensionPath = Mage::getModuleDir('js', 'VivasIndustries_SmsNotification'); 
              $head = $this-&gt;getLayout()-&gt;getBlock('head');
              $head-&gt;addJs('jquery.js');
              $head-&gt;addJs('vivas.js');

              return parent::_prepareLayout();
           }

        protected function _prepareForm()
            {
            $form = new Varien_Data_Form(array(
                                    'id' =&gt; 'edit_form',
                                    'action' =&gt; $this-&gt;getUrl('*/*/save', array('id' =&gt; $this-&gt;getRequest()-&gt;getParam('id'))),
                                    'method' =&gt; 'post',
                                 ));

                $fieldset = $form-&gt;addFieldset('edit_form', array('legend'=&gt;Mage::helper('smsnotification')-&gt;__('SMS Information')));

                $CustomerGroups = Mage::getResourceModel('customer/group_collection')-&gt;toOptionArray();

                $smsprice_value = Mage::getStoreConfig('vivas/smsprice/smsprice_value');
                $smsprice_tag = Mage::getStoreConfig('vivas/smsprice/smsprice_tag');

                $customerArray=array();
                foreach($CustomerGroups as $each){

                     $count=Mage::getResourceModel('customer/customer_collection')
                                -&gt;addAttributeToFilter('group_id',$each['value'])-&gt;getSize();
                $SMSPrice = $count * $smsprice_value;               
                     $customerArray[]=array('value'=&gt; $each['value'],'label'=&gt; $each['label'].' - ('.$count.' Members) - ('.$SMSPrice.' '.$smsprice_tag.')');

                }

                $CustomerGroups = array_merge(array('' =&gt; ''), $customerArray);

                $fieldset-&gt;addField('customergroups', 'select',
                        array(
                            'name'      =&gt; 'customergroups',
                            'label'     =&gt; Mage::helper('smsnotification')-&gt;__('Customer Group'),
                            'class'     =&gt; 'required-entry',
                            'after_element_html' =&gt; '&lt;br&gt;&lt;small&gt;If customer group is not selected the SMS will be sended&lt;br&gt; to all store members!&lt;/small&gt;',
                            'values'    =&gt; $CustomerGroups
                        )
                    );


                $fieldset-&gt;addField('smstext', 'textarea', array(
                          'label'     =&gt; Mage::helper('smsnotification')-&gt;__('SMS Text'),
                          'class'     =&gt; 'required-entry',
                          'required'  =&gt; true,
                          'name'      =&gt; 'smstext',
                          'onclick' =&gt; "",
                          'onkeyup' =&gt; "CheckLetterSize(this)",
                          'after_element_html' =&gt; '&lt;br&gt;&lt;b style="color:brown;"&gt;&lt;span id="charNum"&gt;&lt;/span&gt;&lt;span id="charNum1"&gt;&lt;/span&gt;&lt;/b&gt;&lt;br&gt;&lt;small&gt;SMS text must &lt;b&gt;NOT&lt;/b&gt; be longer then 160 characters!&lt;/small&gt;',
                          'tabindex' =&gt; 1
                        ));






                if ( Mage::getSingleton('adminhtml/session')-&gt;getsmsnotificationData() )
                    {
                        $form-&gt;setValues(Mage::getSingleton('adminhtml/session')-&gt;getsmsnotificationData());
                        Mage::getSingleton('adminhtml/session')-&gt;setsmsnotificationData(null);
                    } elseif ( Mage::registry('smsnotification_data') ) {
                        $form-&gt;setValues(Mage::registry('smsnotification_data')-&gt;getData());
                    }
                // Add these two lines


                $form-&gt;setUseContainer(true);
                $this-&gt;setForm($form);

                ////

                return parent::_prepareForm();
            }
    }


Here is the code that i have in my save action:

$groupId = $this-&gt;getRequest()-&gt;getPost('customergroups', '');
if (!empty($groupId)) {
    //Get customers from a group
    $customers = Mage::getModel('customer/customer')
                        -&gt;getCollection()
                        -&gt;addAttributeToSelect('*')
                        -&gt;addFieldToFilter('group_id', $groupId);
} else {
    //Get all customers
    $customers = Mage::getModel('customer/customer')
                        -&gt;getCollection()
                        -&gt;addAttributeToSelect('*');
}


This code is supposed to give me the group id when i press the submit button. 
But i have to get all the phones of these members in array like that:

$phones = array($phone);


How can i get all the phone numbers and make them in array?
