In my camera bag:

Canon EOS 350D and 450D with

EF-S 10-22mm f/3.5-4.5 USM -> Ultra-wide Zoom lens

EF-S 17-55mm f/2.8 IS USM -> Standard Zoom lens

EF 55-250mm f/4-5.6 IS USM -> Telephoto Zoom lens

EF 100-400mm f/4.5-5.6L IS USM -> Telephoto Zoom lens

On my wish list:

EF-S 17-85mm f/4-5.6 IS USM -> Standard Zoom lens

EF 24-105mm f4 IS USM -> Standard Zoom lens

EF 24-70mm f/2.8L USM -> Standard Zoom lens

EF 28-135mm f/3.5-5.6 IS USM -> Standard Zoom lens

EF 28-300mm f/3.5-5.6 IS USM -> Standard Zoom lens

EF 70-200mm f/2.8L IS USM -> Telephoto Zoom lens

EF 70-200mm f/4.0L IS USM -> Telephoto Zoom lens

EF 70-300mm f/4-5.6 IS USM -> Telephoto Zoom lens

EF 70-300mm f/4.5-5.6 DO IS USM -> Telephoto Zoom lens

EF 135mm f/2.0L USM

EF 200mm f/2.8L II USM

EF 500mm f/4.0L IS USM

EF 600mm f/4.0L IS

And/or an Extender