It had been a long while since any updates were pushed out the pipeline, but finally some progress was made! There was a significant change to the database model that eliminates some major annoyances and paves the way for team and open sign-up tournaments. No longer will you have to enter @challonge.com for users without email addresses. Also, the participant management interface is far more flexible than before, and the tournament setup process is more user friendly... I hope.
As mentioned in the previous post, the brackets have a face lift coming. Single elimination tournaments already have the new look, so if you're interested, give it a quick look using the bracket generator. The "classic" bracket will still be available as a printer friendly version.
Next in line: new bracket look for double elimination (already in the works), open sign-up tournaments (right now you have to sign up people on your own), and team tournaments (the one I have the biggest personal need for right now). After these are shipped, I'll be looking into bracket export options (image, pdf, etc.) and embedding options so you can post a live bracket on your website or in forums with custom colors & styling.
Let me know if you're in need of a certain feature and I can adjust my priorities. Suggestions and feedback are always appreciated!