Thank you thank you thank you! I had been using ODCompletion for years until the switch to Intel and it was sorely missed. Apple's completion is fine to find method names, but it's nowhere close to ODCompletion when you are typing code in a file where most of the names you use are already in use somewhere else in the file.

I like their macros so much that you'll find an ODCompletion bundle I made for TextMate (it's in the TM bundles SVN, I'm not sure Allan ever added it to the shipping version);