A new PSP Firmware Update is now available via Network Update and linked below. Thus far, only one familiar change is listed in the changelog:
<li>Support for PLAYSTATION Network titles has been expanded
Download: PSP Firmware v3.73 (US) / PSP Firmware v3.73 (EU)
Not an exciting update, although it means more PSN titles for PSP are forthcoming which will likely require Firmware 3.73. Additionally, Service Mode has been confirmed as working and PSAR Dumper decrypts everything for those wondering.
More PlayStation 3 News...