"Managed Colocation" is not that hard to find... given how it has become something of an industry buzzword!
There are plenty of providers who offer it a la carte (admin time @ $xxx/hr), and a subset of providers who have made it their entire model. As serverminds mentioned though, the prices will be higher on average when compared to a "raw colocation provider" who is just selling Ping, Pipe, &Power. I think if you do the math though, and really compare the price of colo + a la carte services, with a true managed provider the deal is more than worth it. You actually pay less in the long run because you do really get what you pay for.
Good luck in your search!
--chuck goolsbee, Prineville, Oregon, USA
Please note: I no longer work for digital.forest in Seattle, WA, as I left them in early 2010 to pursue an amazing opportunity at an amazing datacenter project elsewhere... I do not speak for digital.forest here. However I still know they provide the best colocation in the Pacific Northwest.
Last edited by Alex; 06-27-2008 at 01:27 PM.