The FCC filings failed to make any mention of 3G support, so it could very well be the GT-P7510 being a Wi-Fi only model of the Galaxy Tab 10.1. We do keep our fingers crossed that this does not mean it will be gimped graphically compared to the 3G endowed version as with the current Galaxy Tab. Features of the Galaxy Tab 10.1 right now that are confirmed include a dual-core 1GHz processor, up to 32GB of internal memory, a 2-megapixel front facing camera, a 3-megapixel rear camera, a 6,860 mAh battery which ought to run for up to 10 hours (no idea on whose benchmark they based that figure on), support for 802.11 a/b/g/n Wi-Fi and Bluetooth connectivity, and GPS support.
Out later this June 8th, the Galaxy Tab 10.1 will retail for $500 for the 16GB version and $600 for the 32GB model if you’re interested in adding to your tablet collection.