I'm wondering what the relative security of RADIUS is compared to using a PSK.
I know that when using Radius a unique session key is established, whereas with a PSK the same session key is used for everyone, so on that basis Radius seems more secure.
However, to authenticate against a Radius network you only need a Windows account's credentials - which could have a much weaker username/password combination than PSK - so an attacker trying to get in by brute-forcing could potentially get in quicker with Radius than a PSK (a 256-bit PSK is harder to derive than a 4 character username with an 8 character password).
Right now my wireless network only really has myself as a regular user and a couple of others who use it occasionally, and the network is configured using WPA2-Radius (against my home Active Directory) - it's only a residential network and I don't believe it's going to be a target, but you never know what the geeky kid living round the corner is plotting...