iGmail - Gmail iPhonified
Merlin Mann has been positing that at some point Google and Apple will (or at least should) join forces to bring the power of Google's online apps (Gmail, Docs, etc) to the iPhone. While of course you can access your Gmail account on an iPhone through the mobile interface (which was recently improved), it's a decidedly un-iPhone experience.
Enter iGmail - an Ruby on Rails application with a name that will almost certainly be forced to change by Google's lawyers.
iGmail is a simple view on your Gmail inbox, formatted to match the iPhone's native applications. You can try it yourself directly using their demo installation, however keep in mind that you're giving your Google ID and password to a third party.
iGmail is very pretty, but is definitely missing a lot of important features. For example, the current Todo list from the developer includes adding support for starring / unstarring messages, managing labels and contacts, and composing messages using JKeyboard.
Being that this is a Ruby on Rails application, to run it yourself you're going to need a web server that can run Ruby applications. For some people this will be a show-stopper, but if that's the case maybe you can seek out a friend with server space that is willing to let you access your email on the go using this method.
