First of all, sorry if this has already been answered, as I've been searching for quite a while.
I recently moved to WordPress from a Blogger blog. However, I want to make it easy for my Blogger followers (over a hundred of them) to comment and such on the new WordPress site. Is there anyway I can let them use their accounts from Blogger to make comments? Similarly, can I integrate logins from other sites like Yahoo to let them make comments using these accounts? Thanks!