UPDATE:

I sent an email to myself with the WPA key in the text field (you can't just attatch a text file as the attachment gets opened by Mobile Word, so you're ust back to squre one), Selected the text, Copied, Started the Wifi and when askes for the WPA key, held down the trackball and VitoCopyPaste went to work and gave me a menu with a Paste option. And now...

my Wifi works. Hooray!