The HTC Titan is in the process of receiving a firmware update. The update brings the bootloader up to 2.5.160015.3(137079), and no other changes is obvious.
The update to the boatloader will mean custom ROMs will be more difficult to load for the interim, but I suspect this is not a major concern for most readers.
Have any of our readers received the notification, and have you noticed any other changes? Let us know below.
Update: Andrew let us know that HTC is also pushing out a firmware update for the HTC Radar also.
Via XDA-Developers, thanks Jose and Andrew for the tip.