Hello,
I took the liberty of deleting the old Nexuiz 1.5 downloads from moddb. There's a new, exciting release imminent and Nexuiz 1.5 was just useless - Nexuiz 2.0 and 2.1 have been released in the mean time.
Over at Nexuiz.com you can download the (still) current release 2.1. Once 2.2 is out I'll put it here, too.
SavageX