Google and Yahoo rankings

What I've been noticing lately is that some of the websites that we submited to Google and Yahoo take a long time (2-3 weeks) to get properly indexed. That seems to be a universal time frame for all the sites. However, even after the websites have been properly indexed their ranking don't go up as much as we expected. I think that has to do with the way Google calculates Page Ranks for the sites. In particular, the links to the websites get more "weight" as time goes on, so therefore we expect the rankings for the pages to increase accordingly as the time goes.
So far technoza.com has a page ranking of 2/10.