Well, thanks for the replies!
I'm glad you like the look of it - I did some experimentation trying to get it to match my main site in colors but had some serious problems and then I decided that I actually think it's a good idea to have some difference between the board and my personal website. I'd like the board to be somewhat independent (with exception of the "Frederik Magle's Corner")
Since I have started to be more active myself (the last 14 days) I am starting to see a slight increase in users and posts. I guess that's what I have to do - be more active on the board myself (at least until it has gained momentum)
Still, any ideas on more improvements are welcomed!