64 bits ? (Score 2, Interesting)

I got through the YDL website and just found out that : Yellow Dog Linux v4.0 offers 32-bit support for USB-G3s, G4s, G5 Power Macs. If I decided to buy a G5, I would expect it to work in 64-bit mode, not just in 32-bit mode. Some kind of strange since the G5 64-bit instruction set seems to be working with Linux. I found at IBM DevelopperWorks how to set up a 64-bit mode (Y-HPC Kernel), but it still seems to be beta...