I don't do video. Take everything I say with a grain of salt, and I'm open to criticism, but please be nice because I know nearly nothing.
The GH2 with hack is supposedly amazing. For example, here's a quote from someone who probably does know something: "The Canon Cinema EOS C300 at $15,000 is just not a good investment for me I’m afraid. It is out of my budget and far too expensive when I can get such similar results in terms of image quality from the $700 GH2 with good glass, or a $4500 FS100." From here:
Why I am no longer a Canon APS-C user | EOSHD.com
As you stated in the first post, the D90 is too complicated, so the GH2 is out.
My response, then, is to try the GF2 or GF3. Both have been hacked. Both are familiar in feel for a point-and-shoot user. No viewfinder. Hold it out at arms length.
As for the hack complexity issue, it is only as complex as you want it to be. I like easy stuff. So I downloaded a stable hack, installed it, and carried on. I don't push the boundaries, but even so the results are tons better than originally provided.
If you want to go for it then I'd be happy to help you install the hack. Once the hack is installed you can move on and forget about it.