You can use blockchain.info to import the private key into their online wallet
Can you please dumb this down for me? Is this right?
1. Go to Blockchain.info
2. Wallet
3. Login
4. Import/Export
5. (ominous "Advanced Warning!" message). Click "I Understand"
6. Import Private Key
Is that right? I got through Step 6 and then after that it started recommending that if the Private Key is from a "shared source" I should Sweep instead of Import Directly. It is not from a "shared source" so I chose Import Directly, but then it gave me another ominous message that basically forced me to click Sweep. I did and then I got pink highlighted message in the top-right corner of the screen, but nothing happened. I just checked my paper wallet and all coins are still there.

Continue with following steps:
...
6. Re-enter your main password.
7. Import -> Import Private Key -> Enter your private key (or scan it with webcam) and click "Add Private Key".
8. Chose Import Directly, wait for transactions loading.
9. Click on "Send Money", enter your Bitstamp BTC deposit address, than click "Send Payment".
10. Wait until 6 confirmations and sell your BTC on exchange.