I have a few WordPress sites and I want to make it easier to manage. I was thinking of being able to switch sites in the dashboard like WordPress multi-site, but when I was looking into it I see that's only for blogs inside blogs (if that makes sense). Is there anyway to link to different blogs together (I have around 5 blogs all with content on them so I don't want to make them in to 1 site with mapped domains).
So to sum up, I want to make it really easy/fast to switch between sites for the admins. I like how WordPress multi-site does it, but I don't want to move all the blogs in to one and map the domains, the domains are all on 1 server. Is this at all possable and if so how? Are there any plugins?
EDIT: If there is no way, how would I make 6 single WordPress sites into a WordPress multi-site?