With an 8220 w/o a data plan will the wifi have any function at all?

I'm going to probably be getting one since they are free at Best Buy (haven't had a BB in over a year, hence you haven't seen me in a while)

(My experience with blackberries stops at the thumb-wheel models, I have never used a trackball model)

And I'm well aware that without a data plan you can't get mail over the data network.

Wirelessly posted (8320 Titanium)

Check the FAQ and your answer is in there...

http://blackberryfaq.com/index.php/Main_Page

It didn't say much under the wifi faq (i read it yesterday), just push mail and gmail don't work, but it didn't say what did.

You can use the wifi browser to browse the web. You can also download OTA applications using the wifi browser. There are a few applications that will use stand-alone wifi but not many.