WiFi Connection

SORRY for the off topic, but Audiogon has some of the most intelligent members on the net!

I have just bought a new laptop and have never had a home "desktop" computer. Is it possible to setup a wireless network for internet access WITHOUT a desktop computer? My laptop has a built-in WiFi card and I have ComCast as my ISP. It works now, but has to be hard-wired from the modem to the laptop.

Is there such a thing as a cable modem that has the WiFi built-in so once it's hooked up it will transmit WiFi to my laptop so thay I can use it anywhere in the house?

THANKS so much for your time!!!