I tried out the new shoes tonight. I'm not sure yet if I like them.
They feel comfortable on my feet, and they're noticeably lighter than the Supernova Sequence, though that didn't translate into a faster pace.
On the negative side, they're noticeably less cushioned. I definitely feel the road more than I do in the Sequence 4's. It's been so long since I ran in anything besides a heavier stability shoe (the Sequence 2 or 4), that I can't really tell if that's a good thing or a bad thing...it's just different. At a few points during my run, I felt some twinges in my knee, but it's too early to tell if these things are inviting my ITBS back into my life or if it was nothing. My knees feel fine now.
It's hard to evaluate shoes right now, because my calves are just a mess. I had tightness and soreness in both of them, although neither one is as sore as the right one was on Tuesday. The Tempos aren't the magic elixir that is going to swiftly revive my running career, it seems, but I'm going to use them in the 8k and then try to put another 3-5 miles on them on the boardwalk on Monday morning. If I hate them after that, or feel that they're going to shred my IT band or ruin my calves (even worse) I'll probably return them.
I do have a known option, though. It turns out Charm City Run had ordered a a pair Sequences for me (I misunderstood and was under the impression they'd call if they could place the order), and they arrived at the store today. I could exchange the Tempos if I don't like them, or I could keep both pairs and do most training the stability shoes and save the lighter shoes for shorter training runs and races. Hopefully I'll have a better idea by Monday morning.