Apple’s app approval team is still hard at work approving and rejecting iPad apps coming from developers eager to get in early. In the App Store is more than 3100 iPad apps and counting, according to Mobclix.

Here’s the breakdown of the current iPad apps: About 80 percent/2523 iPad apps are paid apps. 20 percent of them which are free, coming to 599 apps. Most of the apps are games, taking up 942 of the 3,100+ iPad apps. The average price of the apps is $4.99. Most of the books apps are paid.

Which iPad app is your favorite?

Last week, Amazon finally released the long-awaited Kindle application for Mac users. Today, Amazon launched a preview page for the iPad Kindle App.

The Kindle App for the iPad will include numerous features that you already enjoy with the iPhone, Mac or Windows Kindle app and more:

• The ability to adjust the screen brightness right from within the app to reduce eye strain.
• Shown in the image below, turning a page with your finger will replicate a ”Page turn animation” just like the iBooks app.
• “In cover-navigation view, the sky behind the silhouetted figure will change according to what time of day it is.” says TUAW.

The Kindle App and iBooks App will be competing to live on your iPad, since the iBooks app will not be preloaded on the iPad, but rather you’ll have to get it from the App Store like the Kindle app.

Penguin Group CEO John Makinson revealed some of the company’s forthcoming titles that’s coming to the iPad at the FT Digital Media & Broadcasting Conference in London yesterday [paidContent:UK].

“We will be embedding audio, video and streaming in to everything we do. The .epub format, which is the standard for ebooks at the present, is designed to support traditional narrative text, but not this cool stuff that we’re now talking about.”

As shown in the video below, the “books” resemble more like applications than traditional e-books, just what we would imagine books to be on the iPad, “very interactive learning experiences.” In fact, Makinson says that most of the “books” will be sold through the App Store as opposed to the iBooks Store.

“So for the time being at least we’ll be creating a lot of our content as applications, for sale on app stores and HTML, rather than in ebooks. The definition of the book itself is up for grabs.”

When asked about the 30/70 Split with Publishers, Makinson replied with, “this is better than the equivalent print agency model, in which publishers let retailers keep 50 percent.”