This link is AWESOME!
Apologies if it's been posted already, but I couldn't find it.
Unfortunately, I just drank my last Paulaner Hefe (and rinsed the bottle for re-use) - wish I would've tried culturing from the sediment! I do have a Hoegaarden in the fridge - perhaps I'll try a culture with that one.
Please chime in with personal experiences regarding this method of obtaining yeast!