Thanks wige, I expected that 302 would be the default but wasn't sure.

I found an interesting blog entry by Matt Cutts regarding 302 redirects.
http://www.mattcutts.com/blog/seo-ad...302-redirects/

It is true what you say about Google preferring 301 redirects, but do you think it is appropriate for this specific situation? 301 redirects is important if you want to retain pagerank for pages that have been permanently moved to another location. Since I am not concerned about the pagerank of an affiliate link, I think 302 would be more appropriate here, because this redirect is more about functionality than pagerank, as a matter of fact, page rank is not even a factor here. Please correct me if I'm wrong.

I have read that you could have done a lot of nasty things with a 302 redirect in the past, so Google no longer places such a high premium on them. If I understand the article by Cutts correctly, I don't have to worry about getting penalized because of these redirects as long as I use them in good faith and I do not do some weird redirects or redirect to bad or spammy pages.

On the other hand, what I see as good faith and what Google see as good faith, can be two completely different things, right?