Less than a day after the Japanese update comes the USA update, heres the info of whats new in english:

The PSP® system software version 3.50 update includes the following:

Network
You can now connect a PSP® system to a PS3™ system via the Internet using [Remote Play].
[Communication Settings] has been added as an option to the [Remote Play] menu.
[RSS Channel Guide] has been added as a feature under [RSS Channel].

Via Playstation Home

Cool a new firmware, but this is useless to me since i have custom firmware.

I don't know when i stopped playing PSP
just got meh DS

doesnt seem like much

whats an rss channel guide?
I wish they would release an rss text reader

cool stuff, wish i had a PS3... haha