blog transfer

I am having a wordpress site(abc.wordpress.com) and i want to transfer it to a domain(abc.com).All the backlinks and the PR of the site will remain same or they will be down? Plz help me out with this Thanks in advance

Hello BHWers, I have a blog which has aquired the PR of 3 and suddenly, the person who had the hosting of my blog erased all the information. I had to install a new blog on my own hosting (which is what I had to do at first) but I can't recover the postings, images, links and everything the...