So Sony launched their v2.70 firmware in Japan, and like we heard back in March, this version brings Flash capabilities to the browser in addition to a new RSS Channel function allowing you to save audio content to the MemoryStick. As a bit of surprise, Sony also threw in support for the AAC audio format playback -- hey, they did co-create it. We'll just have to hold tight for a US-bound release which should drop within the next few days, or weeks, or you know, whenever Sony feels like it.
[Thanks to everyone who sent this in]
Update: US release is up, here we go! Thanks to everyone who sent this in.