What custom ROM did you end up using? (Or did you roll your own?)
VEGAn 5.1.1 the folks over at XDA Dev are awesome.
I agree. The gtab is completely useless out of the box but at the price and with the support from devs at xda it is definitely worth a look. I use mine all the time. Vegan 5.1 pershoot kernal and thumb keyboard. I love my gtab.