MyDogHasFleas

This is going to sound kind of odd. At least it does to me. I have several new domains that have no pr and they aren't listed in google. I have a few others that have no pr, but they are in google. This is something that I've only noticed within the past two months or so. I've never seen anything like this before. A few of them don't even seem to be getting spidered. I've worked with a lot of domains over the years and I've never seen this before. At first I thought it was flawed wordpress installs that were blocking the spider somehow. I have this problem with one site and it isn't using wordpress at all. It has no pr, but it is in google. I've done seo for it and I have backlinks and traffic. It is at least a month old and has no pr. Not even pr0.

Anyone know what's going on? I've never seen it before and I'd like to be able to fix it.