I've been using it for awhile as well and what's totally nuts is that the entire interface (colors, images, tabs, scrollbars, buttons) are all described in a CSS-like language inside a configuration file. I actually changed all the PNGs out to make the tabs look different and go for a Lion-like scrollbar and it was no sweat. Everything in the entire app is described in JSON config files so you can literally muck around with the internals as much as you want. The best is when you miss a comma, restart Sublime Text and the entire interface is garbled :)
I also wish the tab text collapsing worked differently. Once you have over a certain number of tabs they become pretty much useless as you can't see any titles anymore. In contrast, TextMate keeps all the tab titles visible and just moves the extra tabs into a dropdown. It's not perfect, but it's more usable than what Sublime currently does.
