Obviously it can take months to show that your site has a PR. And until that time arrives, quality link development is very difficult. Do you request, let's say for example 200 link exchanges, and the ones that you land - you give it a rest until PR updates - and then continue with link development?
Or do you just continually work at it, regardless of PR.
Cause we know, a lot of webmasters don't like link exchanging with PR0 sites.