What can I do with a dead site?

I have an old Blogger site that I've long since abandoned; it was ranked first in Google for a while and was sitting at 50,000 visitors a month while I maintained it (now at a lifetime history of 250,000). I also have a Facebook fan page with 350+ fans, and for some reason I still get about 200 views a month to my dead blog and about 5-10 new fans as well.

I know that I can edit my domain name, content, and Facebook fan page to reflect a new site (though the traffic will be shady and untargeted for the new niche), but I'm wondering whether you guys think there's actually any benefit to using the bones of this old site for a new project. Will having an aged site help me rank faster if I'm completely changing my keywords and niche?

Bump, still hoping for some ideas or feedback!

Why don't you just start working on the old site again and put Adsense on it?
Don't fix what aint broken.

It was the first site I tried to market, I got lucky with views but it's not a profitable keyword and the work required to get those views isn't worth what I was making through AdSense.

I tried to get through my Facebook fan page and delete my likes down to 200 so I could change the page name, but I can't find a way to delete likes beyond a certain period of time. Is this even possible at a certain point?

50,000 hits per month is really nice
I would rather fix it back then creating a new site

incase if you change the site then deleting the content will loose all the PR as well as ranking
so if possible keep the old content and start posting new one related to your new niche

I'm pretty sure you can't change your page name irregardless of the amount of likes you have.

If I were you, I would try get it to 50,000 views a month again.
I get at least 1 click per 100 views on my blog as long as the traffic is real.
Thats 500 clicks a month at least. 16 clicks a day. Get some good ads on there and you could easily hit $100 per day I think. Try different ad placement. That's my 2 cents at least.