Apple has an official Twitter account for the App Store, appropriately named @appstore, which promises “official App Store tweets including featured apps, exclusive offers, and more.”

The first post from the account came only a few hours ago, but there are already 80,000 followers signed up.

One of the questions that people have had with the Mac App Store was the question of “discoverability” of apps on the store that aren’t “featured” or on the “top” lists; hopefully this account will be one more way for Apple to get the word out about new apps that you might not otherwise hear about. If you aren’t a Twitter user, you can always follow the RSS feed for the account. If you’re on Facebook, App Store is there, too.

Apple started the countdown to 10 billion earlier in the week with a counter on its homepage, so we knew the time was near. The are hundreds of thousands of apps to chose from in the App Store in a number of categories.

As of this writing Apple has not said who downloaded the 10 billionth app or what that app was. The page on the company’s Web site announcing the 10 billionth app says the winner is Gail Davis of Orpington, Kent, UK.

Davis downloaded Paper Glider, an app that tests how far can you flick and fly a paper plane.

For downloading the 10 billionth app Davis will receive a $10,000 iTunes Gift card from Apple.

One of the many new features introduced in the iPhone 2.0 update is the ability for the iPhone’s calendar app to recognize multiple calendars you have in iCal or Google calendar. If you sync your calendar to your iPhone through USB, you may notice a bug where the colors displayed in the iPhone calendar don’t match up with the colors in iCal. Although this appears to be a bug that Apple will have to fix, there are a few homemade workaround solutions you can try if you’re as meticulous about your colors matching as we are. Read more…