been running strong since my app2sd mod, camera mod still going strong, GPS , Movies/Music at work, Web/Market surfing, Games (pocket legends rocks !), VOIP
On ATT you need to purchase the data plan. They offer 2, $4.99 for 1MB (which is like 4 web pages) and 100MB for $19.99. Both of these plans last for 1 month. If you choose neither then you will pay a fortune to access the internet. Hopefully soon there will be better options but since the Huawei is still the only tablet to have a sim I would expect this to stay as it is for at least a while...