Thanks for mentioning this feature. I always wanted to have it but somehow, I had completely forgotten about it
I had a couple of free hours today so I happily got round to implementing it
I'm about to commit it to CVS so it will be included in 0.3.
Every category has now an additional attribute, that tells wether that category should be shown or not in the main page so in a way, I improved your own suggestion a little
You can now show more than only one category on the front page. If you only want one, then simply disable every other category but that one. I thought it'd better that way