With only $2000 to invest, and a limited to almost no knowledge of the stock market, the most sensible thing to do would be to invest all of it into a broad mutual fund. With broad I mean one that has stocks from various different countries and different sectors. Preferably you would also add to this portfolio on a monthly basis. This could be done through a 401K plan or an IRA account if you want to save for your old age.
If you can afford to gamble a bit with your money, you can pick a few high risk stocks, like Apple or China Mobile etc. That way, you have a chance of a higher return, but of course, it's also a bigger risk.
If I were you, as I assume you're a Mac fanatic as well, I would just open an E*TRADE account and purchase Apple stock for the whole $2000. I think Apple has a great future, and as a Mac fanatic you will have a tremendous joy following the ups and downs of the Apple stock. And you can always sell at any time you feel you are risking your savings. I have quite a large holding in Apple myself, and so far my Apple stocks are up about 45% from last year!
Most analysts agree that 2007 will probably be a pretty good year for the stock market. They talk about gains from 10% to even 40%. So this is a good time for you to start getting into the stock market. And don't forget to put some money in every month. That'll make a huge difference in 20 or 30 years!