I am with SSS and Dorian. I am also an owner of the GNX4. I am attempting to be completely bias here. The GNX absolutely rocks. [img]images/smilies/woot.gif[/img] No you do not have to connected to the PC to record. You can record onboard to a CF card (previously a Smart Card) and hold huge amounts of data (such as backing tracks from this site). SixStringSlinger and myself are promoting this site at DigiTech.
Let it be known for you POD guy's (and gal's), the POD XT Live has been leaked out on the Net before Line 6 has expected. This is pretty close to a proximity of the GNX4. It is a floorboard, etc. I, however, do not think it has the capabilities of the GNX4 from the reports, but hey! You let us know. Anyway, here is the 'unofficial' link you may be looking for...
http://www.vettaville.nl/vvlatestnewsnl.htm