A copy of the course summary can be found in Postscript and PDF format.

Problem sets can be found here, in TeX, Postscript, and PDF format.
Information on exams, as it becomes available, can be found here.

Information that is not intended for wide distribution will be placed in the class lockbox. The lockbox is password protected; see the instructor for furher information.

The Topology Atlas is a huge database of (mostly research-level) information on topology. It includes a page of lecture notes in topology, for example.

More generally, there is the rather entertaining Interactive Mathematics Miscellany page. My favorite little tidbit so far has been "[By the extreme value theorem,] for any object there is a distance at which it looks its best." (It took me a little while to figure out why that was actually true.)