Saw this on android and found this for windows mobile (This app isn't the same but concept is, the WM app is actually older)
Anyways it "browses" for you using text messages, hard to describe if you don't know what I mean.
the site is
http://shorthandmobile.com and works with sprint (I'm sure it works with others, but I just don't got them to test myself). I had to remove short code text block on my account but I forgot I had them block it years ago because of spam lol
edit: should have played with it a bit more before recommending it :S lol, well it works, it just crashed my sense so phone had to be soft reset, not sure if this is for everyone though or just mine :S, overall it was ok, fairly slow for some things but it got you the info
I like the gasbuddy though since I can't find an app that does that in WM since I don't like using bing