The problem with disconnecting is that so many programming problems are best solved by a liberal application of Google. Similarly, I've never found man pages to be as efficient or helpful as a well-constructed Google query. I suppose one solution would be to install OpenWRT on your router and keep a whitelist of sites (or a blacklist if you can easily classify 95% of your time-wasters) for your work computer and allow free reign to your home computer.
The problem I think I'd encounter with a blacklist is that skirting it suddenly becomes an interesting challenge. Proxies and VPNs can get me where I want to go, and the idea that I'm not supposed to makes it more tempting. If I implement a whitelist and block my work comp's MAC address from accessing the admin panel on my router, then I'd have to physically get off my ass in order to circumvent it, in which case It'd be easier to just do the damned work.
