I think 'the big' secrets are original posts and very good backlinks. one of my friend's blog got pr3 in 3 weeks... And i agree Resident, Google made some changes because many people its surprised about their new pr's
congratulations, and i agree with the previous post, it will be hard to keep, so try your best not to lose it
congratulations but let me tell you that most wordpress.com sites do get a PR3 without much effort (wordpress.com is a trusted/authority site)
i think it's because your site are in wordpress.com and you site updated very often and has links from wordpress tags
Any of you able to get such high PR in 40 days only. Keep on checking my blog to know how I am going it