Grandma.com
I had a product idea this morning... Not sure if you could make money off it, but I was amused.
Start an e-mail alias company (like Bigfoot.com) except rather than just forwarding mail in the typical digital way, it forwards the mail through snail-mail. You pay a subscription fee and then whenever you send a mail to an address like "YourGrandma@grandma.com" the mail is printed, folded, stuffed in an envelope, and mailed along to your grandma. Obviously, that's labor intensive, and you'd have SPAM issues (these are probably preventable with a whitelist since it's only going to have a few allowable senders), but the fact of the matter is that I'd write to family members more often if I could do it through e-mail and some of my elderly family members are just not going to use a computer. I barely know what a stamp is anymore with online banking and what not.
I guess the main problem with this idea is that it's going to expire as eventually everyone will be online.

