I've learned a few cool things about Project builder over the last 24 hrs and I thought I'd share: (they may only work with the december tools - not sure)
Project Builder can autocomplete cocoa class names. E.g. if you type "NSS" and then press F5 it will turn into "NSString" - cool eh!
Command-double clicking a cocoa class name (or method name) takes you to that classes definition in its .h file
option-double clicking a cocoa class name (or method name) opens it's documentation (if available)
[ 12-20-2001: Message edited by: Diggory Laycock ]