This is even more important if your business uses e-mail to communicate with customers.

I used to own a print business with a .net domain name. We'd often tell a new customer our e-mail address at the end of our first phone call. But too many times customers would just type .com in the e-mail address and then assume that our business has lousy service.

After a few months I paid a cyber-squatter (if that is still the appropriate term) $1600 for the .com version of our name and I never regretted that decision.