On the mobile version of a site I am working on I would like the user to be able to download a contact card straight into their address book.Is this possible with microformats (or anything for that matter) and which phone browsers / phones support what?  I have spent some time researching the issue and haven't come up with anything conclusive.
Contact details on a mobile site
mobile;contact page
I've never seen anything suggesting this can be done directly, ie. tap a link and get prompted to create a contact, but here's a somewhat hacky workaround someone came up with a couple years ago. It's more work than it should be, but within reason if it's still not possible and this is important to you.The condensed version is that you create a link to a vCard on your site somewhere, for everybody, but then do a bit of basic browser sniffing via PHP(or whatever) for mobile access. If detected, replace the aforementioned link with a link to a quick form the visitor can use to have the vCard e-mailed to them. Once received, they can use the phone's native support for importing them.