Well, I can probably give a pretty good perspective because I just built my shop up from scratch in the last few months.

In no particular order:

Lots of Great Planes Easy-Touch Sanding bars of all different lengths. (I have 3 of each. 80, 150, & 200 Grit sandpaper on each)
Dremel tool with cutting wheel & sanding drum
Weight bags ( I just use kitty litter in ziplocks)
several squares, small X-Acto ones are nice and larger ones for squaring the fuse & such.
several clamps and clothes pin's
I have a couple level's that are good straight edges.
Wax paper for covering your plans
Hobby-Lite wood filler
Thin, Medium, & Thick CA (and debonder) (read my Ultimate build thread for some good CA humor) [:@] http://www.rcuniverse.com/forum/fb.asp?m=3899491
CA accellerator
Micro saw
X-Acto file set
T-Pin's
Ceiling tile for building on
small drillbit set (i think it's made by X-Acto too)
Robart plane stand
Covering iron
heat gun

I'm sure there's more but that's what I can think of off of the top of my head. [sm=spinnyeyes.gif]