Looking for someplace new on the Internet? Here is Patch's weekly round-up of must-see Web destinations, picked for Arlington County.

• The A-Town Dog Blog posts weekly entries about the dogs of Arlington.
• Karaoke in a cab? Meet Joel Laguidao, a cab driver who has a karaoke machine in his cab for both himself and his customers. Read about him at the Washington Post website and watch a video of him and his fellow customers singing a few tunes. He has videos up on YouTube, too.
• Cherrydale Branch Library is looking for a volunteer to organize its children's books. You can find more local library positions here.