We have a report that the HTC Titan, at least in Denmark & the UK, is being pushed the 7740 OS update. As a recap, this update fixes a voicemail notification bug and fixes Exchange 2003 email support. The update looks to be an interim and minor update, though considering the bugs, perhaps not so minor. Yesterday, reports flooded in of some Samsung and HTC devices receiving this update.
Of course our AT&T friends are wondering if they will get it too for their Titans, but unfortunately at this point there is no evidence of US Windows Phones getting this update. At least according to Microsoft, this is a carrier-update so who gets it and who doesn't will be a little more spotty.
As usual, if you're a Titan owner who is getting 7740, chime in with your carrier/location for others in comments. Thanks, HTCTitan & Lee G., for the heads up!