Hey, a fellow saint? SASS has a 30D? I'm in SAJC but a thru-blue saint since P1.
For a 30D I would say its in the middle of being pro and entry lvl. This is great for serious non-professionals. I will recommend the 30D over the 350D for the larger grip and increased stability it gives. 30D also has a larger screen but thats not important in getting good shots as its just to check composition and exposures. 30D also has the 5fps which is useful for sports. I say useful if you like to burst for sports that is. Other than that its not too different from the 350D. I prefer it over the 350D really just for the grip. I tend to hold the camera more than hanging it around my neck. I cannot say for certain of the D80 as I have never used it.
For lenses, may I know if you are really just shooting sports, or are you assigned indoor events as well? If you do indoors then you need low f/stops.
The canon kit is very fine unless you like to shoot wide. Its sharp above f/8. If you really don't like the kit, then you can replace it with a Sigma 18-50, Tamron 17-50, Sigma 17-70. I personally won't get a EF-S lens or IS together with it for that matter. I want EF for the flexibility of using FF cams in future and IS is too much of a luxury. Just need to practice your postures for stability. I wouldn't get the EF-S 17-85 IS its the worst mix lens I can imagine. Non-constant f/stop and EF-S. You'll really want a constant aperture at all focal lenghts for sports so that you don't miss good shots due to exposure changes.
For telephoto, I will only recommend the 70-200mm f/2.8. IS is more useful on a telephoto then on a wide to medium telephoto like the 17-85mm. But again its more of a luxury. If you are shooting sports only then a 70-200mm f/4 is more than enough; its lighter as well. the 70-200 f/2.8 IS is heavy.
Hope this helps. I am in SAJC photograhic society by the way which is very poor. Having only a overworked Nikon D70 and Lumix FZ-30 and overworked photographers. lol