I’ve found a lot of useful bookmarklets to use with MobileSafari, but so far the Amazon search bookmarklets that I’ve seen use the full desktop version of Amazon.com. Amazon has a pretty slick iPhone-formatted site, so I modified an existing Amazon search bookmarklet (@ LifeClever, via Lifehacker) to search their mobile site:
javascript:Qr=prompt('Search%20Amazon%20mobile%20for','')if(Qr)location.href='http://www.amazon.com/gp/aw/s.html?k='+escape(Qr)+'&submitSearch=Go&m=aps'
(WordPress.com doesn’t allow embedding JavaScript for security reasons, so you’ll have to copy & paste the above into a bookmark in Safari on your desktop before you’ll be able to use it in MobileSafari.)
I know there’s a native iPhone Amazon app (iTunes link), but without an always-on data connection and camera, the app isn’t as useful for iPod touch users. As a member of the latter camp who hasn’t found a real reason to download the app yet, this bookmarklet should make searching for and buying crap I don’t need even easier.