Okay, I was wrong about one germinating, well it is starting to, but the roots have pushed it above the vermiculite (I thought it had leaves already). Anyways, I hope the leaves open soon!

I've had almost all of my melon seeds germinate, and they're usually quicker than any other kinds of seeds for me (2-3 days), but I also put them on top of a heating pad. I think seeds take longer to sprout without bottom heat, so they could take a week or two if that's the case. I've also heard that older seed can take longer, but don't have personal experience with tihs. I'd probably give up after two or three weeks. I heartily recommend jiffy pellets for seed starting!

In my experience, melons and squash vary a *lot* in their germination time. With a flat of tomatoes, brassicas, lettuce, etc, once one pokes up, the others will usually all be poking up with in a couple days. Not so with melons and squash. My first plant up was a pumpkin. My next pumpkin didn't come up until a week and a half later. Same sort of thing with my muskmelons, watermelons, odessa squash, etc.

I wouldn't worry too much about it. IMHO, I find pumpkins and squash very rewarding as seedlings, because once they get going, all that stored energy really helps them take off fast.