If you want to give your MacBook more of the oomph of a desktop, the DeskBook Pro dock from Zemno would be a neat little solution… except for its mind-boggling expensiveness.
Like most laptop docking stations, the DeskBook primarily functions as a port multiplier: slot your MacBook in and you’ll expand your available USB 2 ports to six, as well as two FireWire 800 and one FireWire 400 ports.
The DeskBook Pro also operates as an external hard drive, with two bays that can accept either a 500GB hard drive or a battery. Don’t expect the battery to juice your MacBook, though: it’ll only power the DeskBook away from a power outlet.
Additionally, the DeskBook packs a DVI-out port for the connection of a third monitor to your MacBook. The important thing to note here, though, is this monitor will be driven by USB, so you’ll want to go light on it: it won’t hold up to more performance-intensive tasks.
Not a bad array of functionality, all told, but the price is enough to prevent this from being dropped in many shopping carts: $600 without the $180 hard drive or $150 battery pack. If you want a desktop that bad, at that price, you might as well just buy an iMac.