For more information- unrooted, stock 2.2 FroYo includes wired tethering - but you have to be a tethering subscriber to VZW's plan. There is no bypass.
Wireless tethering is not included with the stock ROM, but can be had courtesy of applications from the market. Be warned, though, that VZW may impose restrictions on your service if they somehow find out that you are using wireless tethering without subscribing to their service.