About a month ago I pleaded with the developer(s) of TextMate to add FTP support to their much-lauded editor. This hasn't yet happened, but, I did go ahead and purchase the application and have been using it exclusively for the past few weeks. Let's see if I can sum up my TextMate experience as succinctly as possible: It's the greatest text editor I've ever used on any platform.
Really, I'm not sure what else I can say. The more I use it, the more I come to realize how incredibly powerful and brilliant it is. Some might remember my proclamation that TextWrangler was the best free editor out there, and I still stand by that, but if you can fork over the money for TextMate (~$40 if you're a student) I can almost guarantee that you'll be swept off your feet.
I genuinely feel bad for whomever tries to move into this space because MacroMates has it on lock and might as well change the name from TextMate to CheckMate.