PC World gave a Wi-Fi VoIP phone from Net2Phone a test drive. Here's a snip from their review:

When you sign up for the XJ100 on Net2Phone's site, you can (as with most VoIP services) choose a phone number in the area code you want. Net2Phone has hundreds of area codes up for grabs, including five area codes from Canada. Alternatively, you could opt for a U.S.- or UK-based toll-free number, so that others can call you for free..



Link: PC World