Which of these kinds of companies would you like to see Twitter acquire next?

• Semantics

• Smarter follower tracking and notification

• Other - this article missed the most important Twitter tool of all! (Baby monitor tweets, plant watering tweets, etc.)

• Its own mobile apps

• Desktop app

• URL shortener with a great API

• Memetracker to count the tweets

• Photo hosting service

• FriendFeed! (or similar cross-network aggregator)

• Geeky data mining service

• Geo-location