Linux VPS at Lylix.net has been an incredible enabling factor for my academic and professional careers. My masters work involved over sixteen people working on shared codesbases - my VPS-powered Subversion server saved me hours of countless tedium, and ensured that nothing important got lost.
The flexibility of my VPS means I don't need to carry around my computer, or even a USB drive - everything I need is accessible by browser or WebDAV anywhere I go. I get the software I want, configurable down to the source code. Best of all, root access means I don't deal with firewall/access problems. With Lylix VPS I'm in control - but if there's ever a problem, Lylix's knowledgeable support staff are only a phone call or email away.