The PlayStation Vita won't be out here in the United States until February 22, but it arrived in Japan and China late last year and Sony has so far been right on top of supporting the hardware. A firmware update shortly after the Vita's launch brought the device's OS up to version 1.51. implementing a number of small bug fixes. Now, Andriasang reports (and I can confirm from my own import system) that FW v1.52 is now available.
Sony hasn't revealed exactly what changes the update brings, but Andriasang suggests that it's another "small bug fix." The site also notes that some Vita owners are saying "via Twitter ad blogs and so-forth" that the update addresses an issue where "the 3G system would not recognize your SIM card." Whatever the case is, I can tell you this: updating the Vita is a snap thanks to touchscreen controls that let you quickly scroll down to the end of the EULA.
No one actually reads those things, right?