Singed up for Vonage today [updated]

Within a week or so I’ll be making calls into the future. I signed up for voice-over IP from Vonage. Anyone have any experience with them? I’m going away for the summer, outside of T-Mobile range, and need a way to send pings back to civilization. Vonage was the most elegant / cost effective. If it works well, I’ll keep it around and use it when the cell phone isn’t free.

My next purchase is a phone to go with it, something that won’t interfere with an Airport Extreme network. Should I spend the money for 5.8 Ghz? Ideally I want something that is thin, with a caller ID display, and no answering machine (Vonage has voicemail).

Update: I got a 2.4 Ghz Uniden. It had everything I wanted and cost $24.99. And it was even shiny black. The 5.8 Ghz was more than twice the price, and I haven’t run into problems with 2.4 Ghz in the past.