First off, the PageRank is something that you should not even bother with. I have friends that have a PageRank 5 site that gets 100 times more traffic than their PageRank 7 sites. This is because of better content and a more naturaly link profile.
Building links naturally will not necessarily raise your PageRank. Some sites Hoard their PageRank by accumulating a bunch of low quality links. This raises their PageRank. It is unnatural, yet it still does this.
I believe what RLorenzen is referring to is TrustRank. This is done by building a natural link profile.
With PageRank being so easy to manipulate, Google has designed algorithms to put barely any weight if any, on PageRank. Concentrate on great content for human eyes, and a natural link building campaign as RLorenzen stated.
You mentioned getting reciprocal links. Google also puts less weight on reciprocal links. It is much better to get a backlink (where a site links to you only) Make sure that the site does not have a lower
PR than you. This is where Google DOES take PageRank into consideration. I understand how hard it is to have sites link back to you via email and cold calling. Of course you know, and hate to hear i'm sure, but the best way to build links is by publishing GREAT content. You can also do some Social Bookmarking and Article Submission. The best is to have a site unique enough to where it is mentioned on a major blog or RSS Feed. This is worth more than 1,000 article posts.
Hope this helps. IM me if you have any more questions.