[shellguy]

Per Sprint live chat:

William
There are some concerns in the community that there will be a charge of $29.99 to use the Wi-Fi function of the phone.
17:27:18 William
Not to use the Hot Spot feature but the actual Wifi
17:29:15 Kayla F
Are your referring to connecting the device to a wife device or connecting other wifi devices to the Evo?
17:30:13 William
To connect the Evo to a router, not to make the EVO the router.
17:31:35 Kayla F
I am checking this for you now.
17:31:44 William
Thank you.
17:33:35 Kayla F
You will be able to connect the HTC Evo to other wifi enabled devices. There is no fee for this part of the feature, but the wifi you use the Evo on might come with a charge if it is not your personal wifi.