The 2007 World Wide Newton Conference took place in Tokyo last month. If you were unable to attend, you can browse the weekend's highlights here.
The big news was the announcement that the Einstein Project - which brings the Newton OS to current hardware - has gone open source. It's now known as Open Einstein, and can be found here.
This is great news, as more collaborators means the more handhelds that can "go green" (and I'm not talking about environmentalism).
Also, Hiroshi Noguchi has released the source code to his Newton WaveLAN drivers. WiFi Newtons for all!
There's more of course, and you can get the full run-down at the link above. Here's to WWNC '08. Might I suggest the east coast of the US?