I'm curious about how people are backing up data on their home machines. My normal regiment includes CD-Rs, but I'm concerned about longevity, I'd like to be able to pull data from these disks in 10 years (assuming of course hardware still reads CDs). Good archival CD-Rs are about $1 a piece, which might be good for storing bunches of small files. External hard drives are a relatively cheap option, but I'm not so sure those will even be functioning in 5 years. DVD burners and disks have come way down in price, but I have the same concerns about DVDs as CDs. I suppose I could just print everything out onto paper :-)
So what's your long term personal back-up plan?