Digital Yacht AIS WiFi Receiver for Transmitting Data Wirelessly to iPads, iPhones, and Computers
Really impressed with this product.  Added it to our boat that only had instruments (Nexus) to have AIS, and also to try this out with iNavX software on the iPAD.  Also able to hook up to a PC via the USB cable. Used it last summer to come down from the San Juan Islands to Portland, OR.  Having AIS in the straights at night was great.  Only issue we are having is getting the Nexus instrument data (boatspeed, depth, etc.) out to the iPAD, but working to solve.