Android sucks

It seems that android (even the 1.5) version doesn't support WPA-enterprise (nor WPA2-enterprise).

or.. at least the UI.
(see http://code.google.com/p/android/issues/detail?id=1386)

But good news - since this is based on Linux, and linux supports WPA-enterprise, an enterprising (sic.) student at Purdue, Fan Zhang, has built an android app to edit the wifi supplicant code in the linux kernel to allow you to edit the supplicant configuration file!
http://forum.xda-developers.com/showthread.php?p=3765595

You can download the app from the Android Marketplace, or from here:

http://web.ics.purdue.edu/%7Ezhang42/wifiHelper.apk

The source is here: wifihelper - Google Code