O_o
I did a DFB yesterday with 2 friends and me on 2 accounts... I pretty much suck at dualboxing, let alone quadboxing. In theory I have like 9 different accounts to play with but in practice I don't think my computer could handle it even on low settings, and I'm pretty certain I wouldn't be able to handle it myself. (For one thing... I only have one high level MM).
Pretty cool though.
my lil RWZ Challenge vid
I've personally got dual screens so dualboxing for me is easy peasy, would love to try this but would be an embarrassing moment for my pc!
I wish I had managed to find the time to blog about the quad-box super team I did for fun. Rerolled my namesake as a Bots/Time MM in the lead. The rest of the team consisted of an Ice/Kin Controller, a Cold/Ice Defender, and a Stone/Dark Brute.
The main thing that made it interesting is that I didn't just use a power set on auto; I used keyboard broadcasting software and actively played all 4 characters at once. I had a LOT of keybinds. The ground-targeted powers were a bit of a pain as the camera angle didn't always match up exactly, but most of the time it was close enough.
It was challenging, but great fun, and by the end was able to "solo" task forces on fairly high difficulty settings. I probably used Team Teleport more times while leveling than the rest of the server did in a year. 
Nice. Also: update your MSE or run a security scan.
My new Youtube Channel with CoH info
You might know me as FlintEastwood now on Freedom
Just for fun, I decided to challenge my multitasking skillz. Since Freedom gave access to old trial accounts, I prepped them upand did the lowbie villain SFs.
Team consists of brute, controller and 2 MMs.
Tarikoss
Silver Mantis
Renault:
Since we were near, we stomped on Adamastor.
Ice Mistral
Mort Kal
The toughest parts were the missions that had big maps and narrow corridors. It slowed me down since the MMs kept getting stuck.