Another option, depending upon the speed of your Internet access, would be to use one of the Cloud storage services.
I myself use the free version of Dropbox for various files, and find it very useful. I don't use it for photos as, like Don, I use a NAS device for local back-ups and I also have USB hard drives for portability.
So, if you include the albums I synch with Picasa, I currently have a minimum of four copies of all my photos - you can never have too many copies I say.
