Today at the Google’s Campfire One event at the company’s headquarters in Mountain View the Internet search giant is launching its new app store for business, known as the Google Apps Marketplace.

Last week A news was broken out that Google Apps Marketplace would launch today, reporting that it would be an app store integrated within Google Apps that would allow third-party developers to sell software directly to Google’s business consumers.

Now, with developers gathered at the Googleplex, we’re about to learn how Google Apps Marketplace works and, more importantly, which apps are going to be available at launch.

Some of the notes are given below:

Google Apps Marketplace: The Details

- Note: you can watch the live stream of Google Campfire One on the Google Developers YouTube Channel.

- Vic Gundotra, Google’s Vice President of Engineering, has just started speaking

- Vic is talking about feedback it’s received from its business customers. Google believes that business apps should be run in the cloud. One problem: to use multiple business apps, you need to log into multiple websites, which can be messy and a security threat.

- Google Apps Marketplace announced.

- Details: $100 flat fee, no matter the amount of apps you launch. 20% revenue share. This is an important number, as most app stores charge 30% revenue share, especially Apple’s iPhone app store.

- Over 50 partners for Google Apps, including Aviary, Expensify, Intuit, and others.

- Now Google is talking about the technical details of how to get your app added into the Google Apps interface.

- Google’s diving into secure data access via OAuth. Google’s clearly thought about how to make sure that information that apps need is received from users, but that apps don’t take more information than they need.

- Google has brought up a developer, Ryan, to demo some of the code to integrate his app with Google Apps Marketplace. It’s a “Hello World” type of app.

- If you go to http://www.google.com/enterprise/marketplace/, you’ll see the store’s future splash page.

- Intuit is demoing. They’re the people behind Quickbooks and showing off their Intuit Online Payroll app within Google Apps.

- They’re showing of integrations of Intuit’s payroll system within Google Calendar. Logging in via Google Apps seems intuitive.

- New demo: Scott from Atlassin is demoing Jira Studio. The dashboard they’ve built with Google Apps integration is very impressive. Screenshots coming.

- “Fingertip access” to Google Talk. It has Google Docs integration, and is available today. It’s a very killer apps for development management and issue tracking.

- Another demo: Manymoon.

- The key themes seem to be A) how easy it is to code integration with Google Apps, and B) How many nifty things you can do linked to Google Apps. Google Calendar will definitely benefit from these apps.

- Everything will be available tonight for purchase

- Last demo of the night: Ryan from Appirio, a cloud solution provider. It’s a tool for managing your team’s cloud applications, such as Salesforce. It’s meant to transition enterprise into the cloud more effectively.

- One interesting demo: you can trigger actions within your email with Appirio. You can, for example, get information on customers right from within your email (it’s embedded!). The embeds are called Gmailcontextual gadgets, and they are really nifty.

- Example: Customers emails you saying that a project is behind schedule. With Appirio, you can access from Gmail the projects that are open with the customer vis PS Connect. It’ll show budget, the status of the project, end dates, and notes.

- Google’s David Glazer (Engineering Director) is closing the campfire session.

- The President of Google’s Enterprise division is on stage. Security, compatibility, simplicity, and more are possible through cloud apps, which is why Google has bet so heavily on it for enterprise.

- 25 million active users of Google Apps. And apparently once companies of 20,000+ employees switch to Google Apps, they don’t switch back.