I'm about there as far as kit goes. I have a Canon 30D and 40D, which both suit me well enough. After very careful deliberation I see no point at all in upgrading to the 50D or full frame. I have six Canon lenses, four of which get regular use, and of which two are "L" glass. I have 2 X 580EX flash guns and a Manfrotto carbon fibre tripod and hydrostatic ball head, and a Manfrotto monpood with ball head. I have pretty much all I need in terms of filters, lightstands, brollies, flash brackets , teleconverters, macro tubes and other nik-naks.
Under consideration are a couple of fast primes for wedding use and, if ever Canon actually makes one, a 1.6X crop body with pro spec AF - a mini 1d3, if you will - but I won't be holding my breath as Canon seems hell bent on forcing more pixels upon us rather than anything actually useful.