What are some wireless internet providers?

There is no best wireless laptop provider. Wireless capability is a feature included in most new laptops, but they would all use either 802.11g or 802.11n. The best wireless you can get built into a new laptop now is 802.11n (or just wireless n). You will get the most speed and range with the N. If by provider you are talking about wireless broadband cards for laptops, the best bet would probably be AT&T