I am using something called Gruml on my Macbook Pro and the free MobileRSS on my iphone. Both sync with my google reader account.
Gruml is a little flakey, but not too bad. Sometimes its automatic syncing needs a little nudge, but I like it a lot otherwise. Nice and simple.
The free version of MobileRSS has one ad at the top of the screen, but that's OK with me. If it bothered me, then a few bucks for a nice app wouldn't be a problem.