The PSP Emulator for Windows thats written in java gets yet another update:

Heres whats new:

Implemented most of the function in sceNetInet, sceNetApctl and sceNetResolver. Now, a basic test application is able to connect to the internet (see demos/net.pbp). Only Infrastructure mode is implemented, not AdHoc.
Improved callback execution to not overwrite $v0 and $v1 (was required by the sceNetApctl handlers).

http://buildbot.orphis.net/jpcsp/