If you've already ordered the 17-85mm, I wouldn't get the 28-135. It's a lot of overlap and the lens does the same thing.
For your second lens check out the
75-300mm EF zoom lens <- I have this one, it's a nice telephoto zoom. It comes in with and without IS models
or a prime telephoto lens w/f1.4...those are gorgeous for sports photography. (hint: the white colored, really expensive ones, lol)
Enjoy the camera! I have the 20D myself and I absolutely love it.
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HP Pavilion zd8215 laptop.
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Budget Gaming/Video Editing Rig:
MSI P6N Diamond
Q6600 @ 3.0ghz
4GB Corsair XMS2
XFX 8800GT
inside an Antec 900