Offwire has never been shy about adding new accessories to their lineup before a device's official announcement. Continuing their trend they have sent out an email to customers stating that their HTC Thunderbolt accessories are now available for pre-order.
From the email we note the star offering up additional confirmation that it is, in fact, enabled for the Verizon 4G LTE Network.
Additionally, after some poking around through their website we see that the Merge/Lexikon is listed separately from the Thunderbolt. Don't take anything too seriously, but, if previous case listings show us an expected time frame, we can expect to see the Thunderbolt in a few weeks.