Probably the most important topic for any NFC app developer now answered: How to Create Cross-Platform LaunchApp NFC Tags.
The new article at the TechNet Wiki analyses the different tag contents in use by various platforms to directly launch applications. It also provides a solution how to create a single NFC tag that launches your app on Windows, Symbian and Android.
The new NDEF library for Proximity APIs 0.5.0 contains support for writing LaunchApp records for Windows, as well as Android Application Records. Creating custom and URL records as well as packaging multiple records into a single message has been possible since the libraries’ first release.
An update for Nfc Interactor for Symbian / MeeGo will also be released soon, with added support for writing Windows LaunchApp and Android Application Record (AAR) records.