mhansen - 9:09 pm on Jan 2, 2012 (gmt 0)
We run several successful sites that utilize redirected (we use a 307) affiliate links with no issues at all. High traffic, great exposure in serps for high value 1-2 word keys, etc.
All affiliate links are: - domain.tld/go/trackedlink
We track clicks locally, and block spiders from the /go/ directory as well. We also follow a rule of no more than 2 affiliate links per page.