Hey Ed
My brain cells are not firing on all cylinders (how's that for a mixed metaphor? LOL) - I forgot to mention:
If you are running an iBook 366 with Firewire, then it will not have a DVD drive. Tiger ships on DVD media. You can exchange the DVD for CD's - I would assume you could walk into an Apple store (if you have one nearby), or else you could follow this link:
http://images.apple.com/macosx/pdf/tigermediaexchangev3.pdf
This involves you shipping your DVD and $9.95
back to Apple, and they turn around and send you install CD-ROMs.
But, yes, with enough RAM (256 minimum, and 512 preferred), and the right installation media (CDs), your iBook will run Tiger. ๐
Rich