Full bikes-
One Mountain bike- 2007 Felt Q720
One Commuter/Greenway bike- 2008 Raleigh Detour Deluxe
Sorta bikes-
One 1980's Murray 10 speed in pieces
A couple boxes of random parts like handlebars and cables
As soon as I get some more money (read: win the lottery) I'm getting a few more ponies for the stable-
One Cyclocross bike
One Folding bike
and maybe a Tandem too!
To answer your question- you can never have too many bikes!