Thanks for the info and the link, Tattiefritter. (And I'd like to take the opportunity to say I think your avatar looks like a seahorse. If you look to the side of it and you see it indirectly, the shape of you on your bike with the shadow looks like the shape of a seahorse, I think its cool).

Anyway, tempo run this morning, 10 min slow warm up, 25 min tempo, 5 min slow. First 5 min at faster pace felt like crap, but I got over it and was feeling great. Knees were back to their minor protesting after last week's hiatus, but it could have been the pace.