Sites that require a file upload to
occur as the main functionality, are a little restricted on the iPhone. The
folks at myfonts.com have circumvented this by offering an iPhone
app that allows you to upload
photos to their font-matching service
(WhatTheFont) from either your iPhone
camera, or from existing images in your iPhone Photo Gallery.
The WhatTheFont website is one of the most useful tools by far, in any graphic designers/web developers toolkit. Next time you are away from your Mac/PC and you see a radical/groovy/cute/funky/quirky or modern font on a poster or a menu, just whip out your iPhone and snap a pic and get a font match.
*I tried this on my jail-broken version 2.0 firmware iPhone with no luck, although it is most likely that this is because I’m not running firmware version 2.2.1 (current at time of writing).