If you've glanced at my sidebar recently, some things are changing. I've added a background graphic to the sidebar headlines, but more importantly some AJAXified goodness. Click the Open/Close buttons and play around. I've been messing with what is essentially an AJAX toolkit from Script.aculo.us. If you want to play around with AJAX in your K2 installation, I recommend checking out this article. Otherwise, this might see the light of day in the next release of Deviance so just sit tight.
I'm not sure if they will stay forever or just remain in this little design phase of mine. Please leave a comment and let me know what you think.