Can I activate my iPhone over Wi-Fi only?

I want to completely reset my iPhone but do not have a service plan, computer or any way to connect to iTunes. Can I set it up over Wi-Fi only?

Yes you can but make sure to have a stable connection as there's a possibility to brick your iphone.

http://digitaloverride.blogspot.com/

Yes, you can activate your iPhone over a wireless signal only and without a phone carrier.

Here's a step-by-step guide on how to do it:
http://ipod.about.com/od/iphonehowtos/ss/activate_iphone.htm

Hope this answers your question and good luck.