You can find things of intrest at the following places:

www.parallaxinc.com   This is the main source for text and software for the course outside
                                        of what is supplied in class.  See their link to Stamps in Class
                                        for more.

www.robotstore.com   About what the name implies. Check out the browse catalog section for
                                    intresting things like muscle wire.

www.crynwr.com/lego-robotics/  Lots of links to all sorts of lego stuff.

www.pitsco.com   A fairly good catalog of all the lego stuff with pictures, prices, and
                               of what's avaiable.

www.lugnet.com/robotics/rcx/legos/  LegOS info and downloads as well as NQC, PBForth, etc.

www.seattlerobotics.org/encoder/may97/picchip.html  Details etc. for the pic family of microcontrollers

www.mechatronics.me.vt.edu/book/section2/2000.html   Info of various sorts from another
                                   microcontroller class.  Mostly pic based but some good ideas for any
                                   other controllers too.