TKitty, dont give up on 'em. "Ripe by now" is determined by when you planted them as, as F-dill said, the weather. As long as they're not rotting or withering I'd hang in there with them.
I set out 13 (or was it 16?) plants and as of yesterday have 19 melons that I can spot among the vines (and weeds/grass I haven't pulled.) If I were you I'd check your maturity dates on the varieties you set out; trust me, it'll ease your pain! :>)
Farmerdill, we've had such cool nights here this past month or so I wonder if ya'll have had them also. It sure slows down growth on certain plants, doesn't it? Hope you are doing well down your way.
Shoe
