I thought about that myself, but a lot of e-mail systems have limits on the size of attachments you can send, as I recently found out to my frustration. A 2-3 hr recording would be about 4-5 gigabytes or more in standard resolution. If you converted it to a more compressed format like say DivX, you could get it down to about a gigabyte. But you'd have to split the file up into multiple segments. That would be still be a hell of a lot of e-mails.
Yeah, DVD is the way to go, but I'm waiting for the next generation of digital tuner recorders to come out.