My daily driver for personal use is my 15" DLSD Powerbook.
Work requires I use their provided MBP for anything for the company, and the internal-use apps I work on only officially support Chrome, which rules out PPC anyway. But, even when I'm working, the PB is usually beside me doing something else. Today, it's spent the last 4 hours installing GCC from Tigerbrew (a surprisingly long time TBH, but that's another topic).