I bought a few bags of mixed Narcissus last fall. At first I thought there wasn't much variety, but upon closer inspection, there are lots of types, as you can see here. All of these pictures are April or May 2008.
April 2008Planted 140 in Fall 2007. Location: Half a dozen places in the backyard. The yellow ones generally bloomed first (and were shorter), followed by the purple, blue and white.