There are a LOT of products out there that could work for you. The problem is not finding a WiFi (or 802.11b) compliant product, but one that works with the various Mac OS versions. Unfortunately, you will probably pay a premium with most typically Mac-friendly companies like Faralon and such.
Do some online shopping, and look for explicit support for Mac OS 10.2 (or at least OS X) in the product information.
Your TiBook should support just about any PC card wireless card that supports OS 10.2. I don't know why you don't think an AirPort card will work with your iMac-the AppleCare KnowledgeBase says that any 400MHz iMac has an AirPort card slot-internally, of course.
Here's a link to a KnowledgeBase article that lists AirPort Card-compatible iMacs and PowerBooks. It also lists some third party cards for computers without the appropriate internal slot.
The problem with USB adapters is even rougher than with PC card wireless cards; it's hard to impossible to find one that supports Mac OS. Sorry...
Good luck.
Do some online shopping, and look for explicit support for Mac OS 10.2 (or at least OS X) in the product information.
Your TiBook should support just about any PC card wireless card that supports OS 10.2. I don't know why you don't think an AirPort card will work with your iMac-the AppleCare KnowledgeBase says that any 400MHz iMac has an AirPort card slot-internally, of course.
Here's a link to a KnowledgeBase article that lists AirPort Card-compatible iMacs and PowerBooks. It also lists some third party cards for computers without the appropriate internal slot.
The problem with USB adapters is even rougher than with PC card wireless cards; it's hard to impossible to find one that supports Mac OS. Sorry...
Good luck.