Some folks are able to avoid using them on ailerons by carefully matching the servos and allowing the aileron to flex a bit, but I agree with the others, they are the way to go for digitals (unless you opt for Hitecs and the programmer, as someone will surely point out momentarily), matchboxes just make the setup super easy. There's a pic on my home page of the matchbox in the wing root of my 33% H9 cap, so I can reach it with the wings attached to the fuse. On the rudder, unless you opt for a floating bell crank, you'll either need to EXACTLY match your digital servos, mix two channels on your radio (my preferance for my 33%) or use a matchbox. If you buy matchboxes, check out the twin pack from Horizon, it's cheaper than buying them individually. There's my .02, worth everything you paid for it!

PS - just saw the referance above to RC Superstore - I bought some 8411s from them, they are good guys and $44/matchbox sounds like a great price.