Well I go to check my p207 for the time since my computer is always horribly off. It shows no network (not even T-Mobile with gray bars). I turn it off and on and it finds 6/6 bars on Cingular with no GPRS. Now it shows 3 bars with no GPRS, then 5-6, then 3. Something is going on. Still scary how it had no service until I turned it off and on.....I hope the phone isn't acting up. It's new and very unique (white color), I don't know if I could get another like it...or how I would even go about getting a replacement from Samsung. When I call out, it bounces from 6-0-3-6 or so each time. It gives me the standard Orange message tones.
Bobolito has a thread on network integration. Check it out. He did mention that integration was starting in northern NJ. It's possible DE could be in integration as well.
I believe South Jersey was also just done this past weekend as well, so it sounds like you may be seeing this happening in DE for this weekend.