Proximus GPRS/3G on Nexus One
Here is the configuration to be used for accessing the internet through mobile data via Proximus on your Google Nexus One:
APN: internet.proximus.be APN type: default
Leave all other settings unchanged.
To have it working, reboot your Nexus One (power off and on again).
Especially the APN type value took me some time to figure out.