A professional photographer friend of mine recently recommended the Epson V600 scanner for digitizing your photos, slides and even color & B&W negatives to positives. I bought one today, set it up in less then 10 minutes and then scanned a whole bunch of stuff including a print, slides and color negatives. It simply works great. And it only costs $200 at a commercial camera store I use. Amazon is probably a bit cheaper. You can scan 4 slides at a time.
I highly recommend this.