hmm...check out lastfm, it's a hit-or-miss web site that takes a band you like, then tries to find other bands that sound like them (it's as much fun listening to the 'misses' as the 'hits'...;)
I've seen more than a few Finnish prog bands, so mebbe that can help...

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)