AT&T 4G LTE Tablet, sounds too early to say that since we know there is no LTE 4G on carrier for now and still unknown when that fast wireless data service will provided by ATT. Than HTC Puccini comes reported by pocketnow, make us know/remember that the carrier will have LTE some time in the future.
Still no official confirmation about anything related to AT&T 4G LTE. The all we know is AT&T and T-Mobile provides HSPA+ technology for their "faster that 3G" service right now, and there are only some device that already available.
HTC Puccini rumored will use Android Honeycomb, possibly with dual-core processor and has a main music feature and ship sometime in June. It would shock us we can see AT&T's LTE service in June, 20 days from now?. BGR, Pocketnow
UPDATE:
5 Sep 2011 - HTC Puccini is officially released by AT&T as the HTC Jetstream for $699.99 with 2-year contract, or $849.99 without contract.