Blogs at end of year

I have been having all of my 7th grade language arts students (about 125), as well as my computer exploratory students (60+) blogging on individual edublogs.org blogs this school year. This is the first year I have done this. They are all administrators on their own blogs, and I am an administrator on each one as well. I am wondering, now that the school year is drawing to a close, what I should do. Should I let them keep their blogs, but remove myself as an administrator, or just keep them the way they are? Please share any advice you can from your experience. Thank you!