Hello mate! Welcome back. There hasn't been a lot of new stuff in the past two or so years, sadly. However, Madmab has done some great things with XPort's emulators, Odamex (Doom) has been ported by one of it's authors, and there's a Jaguar emulator, which is slow and needs to have the sound disabled to play many games, but it's an early version and it's just great trying those games on the XBox. Surreal 64 has been updated a couple of times, and there's probably a few more that I can't recall offhand.
Anyway, it's nice to see you back, and I hope you find the XBox, it's homebrew, and it's loyal fans as interesting now as ever.