A new firmware update is available for the PSP. Version 3.72 doesn't seem to add much functionality, other than expanding support for PlayStation Network titles. All in all, a pretty lackluster update - those without a PS3 needn't even bother. Sure, Sony could have snuck in some extra secret stuff, but we're betting not. If you want it, however, go and get it. A PS3 update is expected soon and PSP v3.72 does lend credence to that theory. We're remaining cautious, however. We'll let you know more as it happens.
[UPDATE] The EU PlayStation website has confirmed that firmware v3.72 also has support for the PS3's Remote Start feature which will be included with PS3 firmware v2.00.