I also want one of those 50mm lenses. Those look fun.
I also have a D40, stock 18-55 lens, Sunpak auto 144 D flash, just bought a Vivitar 285HV flash, and I ghetto rigged up a wired flash trigger. it went from Unsecure image, only https images allowed: http://jamiewillmott.com/blog/wp-content/uploads/2009/05/trigger_top_600x400.jpg to this:
and I must say, the Vivi flash is huge. Did not expect that.