We’ve been looking for a date to tie to the HTC Thunderbolt – one of Verizon’s new 4G smartphones – and we’ve gathered enough evidence from several unrelated sources – a couple of which I trust – to suggest it’ll be launched February 14th, the same day Mobile World Congress officially kicks off. Considering marketing materials for the Motorola XOOM tablet were sent to Verizon’s authorized external agents at the same time, we might have just uncovered the release date for that as well. We’re still digging for concrete confirmation.