Depends on your backlinks, usually during the next Google quartery "visible" Pagerank update you'll see a value change. Sometimes it will go from PR N/A to PR0, it can happen. Remember, Pagerank is always changing behind the scenes, the visible value is past data from the last update.
It should not take you more than 1 update. Just get few links from few forums, and there you are ..But really, what will you do with PR1 ?
who cares? Id rather look at how long did it take to make $XXX amount of money. Seems more important to me...
Most sites generally go straight to PR2 if you adopt a coherent link building strategy. I've written a basic guide for beginners who are new to creating backlinks it has a blogging focus but the strategies are equally useful for website owners the article is entitled Make Money Online Blogging