BGR is hearing from their sources that Apple might just release iOS 4.3 as early as today. Apple previously announced they'd be releasing iOS 4.3 on Friday alongside iPad 2 so take it with a Cupertino-sized grain of salt, however Apple has staggered release days previously to avoid everyone hitting their servers all at once. If it does come today expect the usual 10am PT/1pm ET start time.
Also, BGR says the reason many GSM carriers like AT&T will have a 3-device personal hotspot limit -- as opposed to the Verizon iPhone's 5-device limit -- is that the default is 3 but Apple will raise it to 5 at a carrier's request. Guess most haven't requested that...
Anyone going to be checking for updates today, or do you think we'll have to wait for Friday?
UPDATE: The Loop