Well, after messing about with Flock for a few hours, adding all my favourite RSS feeds & so on, I have to say, this is one really unique browser with a groundbreaking feature set... it's RSS functionality alone is enough for me to switch permanently, and it's staying logged into the forums no problems.
The format for saving exported rss feed lists doesn't cover their descriptions, so the feeds from my list can be imported into others' flock browsers... but the titles will need to be redone if you use them..
My feeds for anyone that's interested in building a feeds tab:
http://nikt.ath.cx/flock-export.opml If you're trying to find themes - there aren't many, yet - if you find some, you may be confused as to what to do with the .jar file - opening them seems to produce errors... If you open the themes window, then just drag the jar file into the theme list, it should install from then in the normal fashion you're used to.