Matan Gillon (Zi` to us in #mobitopia) has just released Bochs for the PSP. He has successfully run Windows 95 and command line Linux under Bochs on his PSP. It may not be zippy, but the sheer fact that it runs at all is amazing:
Windows 95 actually runs quite well but don’t expect it to be a speed demon. It takes about 10 minutes to boot but afterwards it’s pretty usable. I was able to do things like: open “My computer” and browse the virtual hard drive, complete a whole game of Minesweeper and run various other applications. Now you too can get your Minesweeper fix on the go 🙂