The same thing happened to me when I originally uploaded my entry. I waited a couple of days, and when it still didn't show, I asked Nick via IM if he'd gotten it. He said no, and that the system sometimes "hiccups", and doesn't take the upload. He told me to upload again, and I did, and it took the second time. But if he's away, you might want to wait a couple of days and IM him again about this - it's probably just another hiccup!