The 45/2.8 is only one of three lenses I own I'm would be loathe to part with (the other two are my summilux 35/1.4 asph and my elmar 50/2.8). It is a great lens - on my GF-1.
There are a few things missing for me when it comes to the 45/2.8:
1. PanaOly ought to bring out a "micro" version of the Nikon R1C1 type flash (size should be like the peanut flash of the Sony NEX) weighing no more than 30gms each including a battery.
2. Manual control.
FWIW, I contacted Adrian Lolli to enquire if his tilt adapter could be further shrunk to allow more lenses (pen F, for example) to be used with the m4/3rds
(if that does not pan out, I will eventually make one myself).
If 8 deg tilt is enough for a full frame, why would one need 30 deg tilt (the current Lolli Tilt adapter) for the micro 4/3rds? 2 deg should be plenty.
Interestingly, my experiments with a Summicron (R) 50/2 on APS-C for movements (despite it being a high resolution lens and all) showed it to be a disaster. Off axis aberrations from that lens are amazingly worrisome.