On crunch, fluff, and system necromancy

We're starting playing RPGs again this week - and I for one can't wait! It seems I've been handed the reins, although Dave has FantasyCraft ready to roll "whenever," but I've been struck by a thought:

My group likes crunch. We love rules, and stats, and rolling on tables. This may well be why the rules-light games (PDQ# etc) we've played have tailed off. I think this could also be why people don't seem too keen on Savage Worlds...

Changing the way we play? - Mouse Guard and Burning Wheel

I can't help but be intrigued by what I've read about Mouse Guard. I dismissed it intitially - who wants to play mice? - and moved on, but then I read about the interesting mechanics involved over at WrathOfZombie's blog, and how they'd been applied to Pathfinder. And then I went in search of more info, and read through all of the Chatty DM's Mouse Guard experience over at CriticalHits...