I bought a laptop right before I moved to England... a desktop just isn't suitable for the traveling, as we are all aware of.
The cord that plugs into the wall (that is, connects my laptop to some electricity) can be plugged into an adapter (not even a converter, just a US - UK adapter) and works fine. It's kind of like what many Brits do here with iPods -- charger from home country, adapter from US - UK plug (well, at least that's what my boyfriend does, not sure about everybody else).
The only quirky things that come up are the looks I get around uni. "Wow, she looks English.... but an adapter... Geez.... she must be, like, Polish or something..."