Finally got around to the small utilities. UIPS and Par2 are updated for Universal PPC/Intel. I decided to not pursue further builds of Unrar and 7z.
Unrar has a universal binary available from Rarlab. And the old-Mac rar name problem is so obscure it's not worth it (I encountered it once in the early Mac OS X days).
7z has a nice universal GUI available from SixtyFive.