OT: How many of you have had legitimate delivery failures. I see it used as an excuse fairly often, but have never had it happen to me. I am currently at 241 transactions on eBay, am I just lucky, or do you think people make it up to avoid negs?
Paul
Edit: I forgot to add my opinion to the topic.

This transaction should warrant a Neutral at best. You didn't get the product you wanted. You will need to decide how upset you are about it. If you think that the seller is a good guy, and deserves his perfect feedback rating, be nice and give him a charity positive, or probably better in this case, just don't leave feedback. You already have your positive, so your decision won't have any affect on your feedback. If you are upset about loosing the boards, Neutral, or possible Negative would, I think, be justified.
About the time to wait, I get nervous if I don't hear anything within a day. I almost always pay within minutes of an auction ending, and if I'm not home then, I will pay as soon as I get home. I have waited 2 weeks for a seller to contact once. I didn't wait patiently, I emailed daily for a week, then got his contact info. The next week, I emailed and called daily. It turned out that he had gone on vacation. I eventually got my item (about 3 weeks total), and was feeling generous, so I didn't leave him a negative. I just never left feedback for him, but I would definitely never buy from him again.
There is no good reason for a seller to go more than a couple of days without contact (unless this is specified in the description). If he can't at least send an email within that time, he should not be selling, or should be selling less.
Paul