I would search expired domain lists, find a good pronouncable 5 character domain and brand it. Just did a quick check: olett.com is available, ewore.com, utuyu.com - I'd focus on finding a name that you can make into something with personality. Google loves brands these days. Good luck!
Yes, get a name that you can have your whole passion building the forum you love. Tell the Search Engines what is your forum about using description.