Roller Comments
The default comment form in Roller is pretty ugly. Not only does it use a <table> to layout the form, but it has invalid XHTML and JavaScript as well. With the new theme on this site, I re-worked much of the comments.vm macro and created a much prettier form. I was hoping to contribute a variation of this theme to Roller for 2.3, but it looks like it'll have to wait until 2.4. Rather than adding new macros for this theme, I'll be fixing all the themes to have a prettier comment form. You can track my progress on this issue using ROL-1131.
As far as this theme, I've named it "andreas08" after its designer. I hope to contribute something similar to what's on virtuastravels.com as part of 2.4. If you'd like to use this theme in your own Roller installation (before 2.4), let me know and I'll try to package up a download.