Ok cool, yeah I can highly recommend both the 12mm and the 45mm, if you're not going to pick up a zoom you may want to consider one of the 25mms (oly 1.8 or pana 1.4 which I have - a little bigger and more expensive but 2/3rds stop faster) as well, but I think the 12 and 45 as a starter kit would give you a lot to work…
I dont have one, but i've done a lot of research into the compact Lumix SLRs. First off you should read: http://www.dpreview.com/reviews/PanasonicGF1/ Now, to answer your questions: 1. The Micro 4/3rs is the lens mount/type of sensor, this is a smaller sensor than both a full frame(very expensive pro SLR cameras), and a…