You can google for "GH2 hack" if you want. I am not going to explain it here as it would take too long.
The GH2 will do at least as well as your D40, if not better, at stills. The D40 can do some funky high-speed flash sync and such but otherwise it's behind the times. In most ways, the GH2 sensor is roughly equal to the D90's sensor if you downscale it to 12MP to match the D90. The D90's RAWs would still have better dynamic range and color but by a pretty small amount.
If you're so worried about the Panasonic 14-42mm X problems then just don't buy them at all. As for Oly, buy the 14-42mm II lenses. You want a "II" which stands for revision 2.
MFT Micro Four Thirds sensor. A little smaller than the APS-C/DX sized sensors on Canon/Nikon crop-bod DSLRs. Technology has advanced to the point where the newest MFT sensors (which are all 16MP unlike the older 12MP sensors) are pretty competitive with crop-body DSLRs. Even the older 12MP sensors are competitive with, say, your old D40. The main claim to fame that MFT has is size/weight reduction. The main drawback is you lose depth of field due to the cropping; just like how full frame sensors can have paper-thin DoF but APS-C/DX has thicker, MFT is even thicker. f/2 on a MFT body is like f/4 on a full-frame body when it comes to depth of field. But it's not that big of a drawback unless you can't live w/o paper-thin DoF.
Who cares about age? For stills/video the d3200 is good (great stills, good video). The GH2 is about to be replaced by the GH3 which is presumably even better, but no official word yet. Still, you can get a GH2 for cheap because it's almost end-of-line and it is a better balance of stills/video (including an articulating LCD), even if the d3200 would win on stills.
There is no "better" camera b/w the two. It depends on what you need them for. If you have a strong need for video or portability, the GH2 may be more interesting to you. If you want image quality at higher weight and lesser video, the d3200 may be a better bet.
What can be done and what is obtained?
Will the photos and the options be better than what I have on the D40 ?
How can I avoid this? Are the new revisions out? If I buy a GH2 from B&H will I end up with an older revision?
MFT = Mirrorless ?, ?
So even though this GH2 is a 2010 model it will be better for my needs than a newer D 3200 ?
Thanks