The version I bought is the Gbox 2.0 which has since been superseded by versions 2.1 and 2.2. I promptly bricked the sodding thing two weeks after arrival trying to do my very first firmware upgrade, DOH!!!
But they recently made the code publically available and released a recovery image, so I was able to restore the unit and start playing with some of the emerging homebrew releases.
So, this is the unit I own:

And here is a link to the GBox homepage:
http://androidtvbox.us/
And a link to J1nx's site, who's homebrew dev is coming along rather nicely:
http://www.j1nx.nl/product/smart-tv-box/
There's a chap called static who belongs to both forums who is doing some interesting mods which some of are likely to be included in J1nx's release.
The homebrew version I am currently dabbling with is static's xbmc-linux_v0.2_beta and I'm intending to testdrive J1nx's gbox_2.0_beta1, which he released this week, in the very near future.
I'm submitting bug reports directly to those sites listed above, so it will probably save time and duplication if you go read about them on their forums, but otherwise will try my best to give intelligent answers to members here who are interested in the discussion.
Oh, and probably useful to mention is: that I bought this thing cos I was too impatient to wait for a homebrew for the AppleTV gen3 and my primary interest is in a hardware platform for XMBC, which I've been running on a modded xbox original for many years as my desktop media player.
I did however dabble about using it purely as an Android 4 box during the weeks before I bricked it and was impressed - a very sexy stepup from the el-cheapo android tablet I had been using for about a year prior to that and ran beautifully thru my 40inch Bravia smartTV.
OK, I think that's enough typing for starters. Hope this is useful so far?
Cheers,
Zana :o)