Bit of a shame to see another developer drop PPC; but to be honest, I haven't found anything I need out of an office suite that the 2004 version can't provide.
After VLC here's another dropout but to be honest I use Office 2008 anyway and have never been unable to work on any docs I bring home from Work but just as an FYI, I'm sure plenty of people use this.
iWork '09 system requirements
A Mac with an Intel, PowerPC G5, or PowerPC G4 (500MHz or faster) processor
512MB of RAM; 1GB recommended
Approximately 1.2GB of available disk space
32MB of video memory
Mac OS X v10.4.11 or Mac OS X v10.5.6 or later
QuickTime 7.5.5 or later
DVD drive required to install
Some features may require Internet access; additional fees and terms apply