ABASSCUBE Unsanity always makes very simple little apps that put in some great, welcome feature in an app that Apple either took out, or should have put in, and iChat Enhancer is no exception. While it does the least of any of their apps/hacks/APE plug-ins, it's very nice to have more than one line in iChat, especially because it's not a normal textbox, so you can't scroll regularly: you have to use the arrow keys instead. This is a serious limitation of iChat, and iChat Enhancer fixes it perfectly with no negative side effects. And it couldn't possibly be a better deal: it's free! :)
(Version 1.5)