Dynamic IP Address workaround

[Greg Bosch]

OpenBSD box (static IP address) sits behind a Wireless DSL router that
receives a dynamic IP address from ISP.
I'm thinking that if the box sends an email to my externally hosted
email address every few hours I can always refer to the most recent
email received (specifically it's headers) to know what my IP address is
while away from home.

Question:
    1. Is there an easier way to always know my dynamic IP address?
    2. If this is a feasible solution, is there a program that can
configured to send a template email to a specific address every hour or so?
    3. Is this something that cron needs to become involved with?

Any advice is much appreciated.
Thanks
-gb