Why did you get new brakes/rotors at 15K miles? That sounds suspicious already. At 20K mi, I'd change the oil, oil filter, maybe air filter depending on where you live or at least check it (here in AZ, it's dusty/windy, so I have to change air filters every 6 mo on my DD), lube drive shafts, and rotate tires (make sure to hand torque the bolts, as over/uneven torque via an impact wrench can warp rotors). If your cabin filter wasn't done at 15K mi, you should do it soon. The wiper blade inspection thing is always a scam. Honda is the same way. "Inspect wiper"...sheesh, give me a break! Maybe if you just came back from the Rubicon, you'd want to inspect/re-torque suspension bolts.
My local dealer does a bunch of unnecessary stuff at 60K mi (adjust valve clearance, inspect timing belt [ie, remove radiator, timing covers, etc.]) and wants $2.4K for it, and it doesn't even include flushing the AHC fluid which is listed in the '03 owner's manual at 60K mi intervals. Other dealers (from posts on the web) do what's listed in the manual and charge $1.2K, 50% less! OTOH, I find they are reasonable if you have a la carte work done, like flush AHC or ATF ($95/hr labor plus parts, basically the same as toyota). You really have to stay on the ball with these guys and make sure they're not doing work they shouldn't be, just to pad their wallets.