The University of Groningen is connected to eduroam, but it also has it’s own similar wireless network, RuG-FN2. Connecting an iPods touch or iPhone is therefore also similar.
Connecting with Eduroam can be done by following the instructions on this site, and for RuG-FN2, there is also this website, but the latter profile will always ask for a password and this is tedious to type in everytime, especially if people can see what you type.
Therefore I made my own profile, which can be downloaded here. Just surf to that page on your iPhone/iPod touch and accept the configuration. Fill in your username and password and you’re good to go. Of course, you need internet access to do that, so you can do this in advance (for example at home).
update: the network changed, find your new profile here