Note: If you don't check your email often or you are not at your computer much during the day, consider using your cell phone's messaging system for security alerts.
In most cases, you can receive emails via your cell phone as part of your standard package subscription. Check with your provider for details. (e.g. Most cingular phone email addresses are: your phone number @ mycingular.com -i.e. firstname.lastname@example.org - dont't forget to include area in your number)
Depending on your plan, you may incur a small charge per msg. - usually 10 to 25 cents.