I run Yellow Dog Linux (PPC) dual-boot with OS X on my 12" PowerBook. I also run MOL (Mac-On-Linux) from YDL, which allows me to run OS X apps directly from Linux at near native speed.
For x86, I use the Virtual PC 7 emulator. The only x86 Linux I've been able to get running ok under VPC 7 is OpenSUSE 10. Yeah, it would be great if BRL released a PPC BMax, but fat chance now that Apple have switched to Intel. I'll probably eventually upgrade when Apple release a 12" MacBook Pro.
For x86, I use the Virtual PC 7 emulator. The only x86 Linux I've been able to get running ok under VPC 7 is OpenSUSE 10. Yeah, it would be great if BRL released a PPC BMax, but fat chance now that Apple have switched to Intel. I'll probably eventually upgrade when Apple release a 12" MacBook Pro.