Another alternative for those who can't make the jump to digital just yet. You can also use your basic Epson Photo flatbed scanner. We recently got one and scanned in some photos. Seemed to work quite well even on the auto settings. Mind you you're still stuck with whatever goofs the developer made but film isn't dead yet !
One last thing ...my friends who do slides tell me that you will need a proper negative scanner to do slides. The basic one I have won't do a good job. In this case (slides) the commercial outfits can afford a high quality drum scanner which I'm told is the best tool for the job.