Yes it is, but you have to keep your Hubscore above a certain rating or they will be nofollow . It takes a little bit of time to earn dofolow, but as long as you consistently post quality content, you will see your hubpage score increase. They will slap you for duplicated copy. Check out the faqs page and you probably can find out what the rating cut off is. This is a great tool for getting indexed quicker, receiving more traffic, and getting some quality backlinks ....if you get the rating. Good luck!
Yes hubpages are doFollow, I use them only for doFollow purpose. If it comes they don't pay back enough.
advise: all the dofollow blogs/sites has a tag like this: alt="dofollow" if you could find this kind of tag,so its dofollow page.
In order for your links to be dofollow you need to maintain a hubber score of 75 and your hub must have a score of at least 40.