I'm trying something new. Since I receive a ton of information that doesn't warrant detailed exploration in TidBITS, I'm starting a new section called TwoBITS that will address deserving announcements but will do so in only two sentences (and contact info). Let me know how you like it after you've seen a few.
Mac OS X Zip Expanding Utility
Firefox (and possibly other applications) may ask you what you want to do with .zip archives that you download from the Internet. If you want to expand them with Mac OS X (rather than StuffIt Expander), you may be unsure of which application actually does the job. You're looking for Archive Utility (in Leopard and later) or BOMArchiveHelper (in Tiger). In either case, the application is stored in Hard Drive/System/Library/Core Services/. Don't move it from there, though, or you'll confuse matters.