OnlyNokia5800[dot]blogspot[dot]com will share contents about Nokia 5800Xm.
We include
1. Third parties Applications & Games
2. Themes (a collection of links and websites)
3. Latest information updates from Nokia
5. Sharing between users

Downloading files from this site is at your own risk. But, I will ensure everything is useful to you.
However, they are few applications that are needed to be signed at SymbianSigned, Don't know what is SymbianSigned? Instruction when signing?? HERE
To check firmware version or whether your phone is up to date for your region HERE

Nokia’s Much Awaited ‘Ovi Store’ Starts Rolling Out

Posted by Isaac Wong Tuesday, May 26, 2009

Nokia’s Much Awaited ‘Ovi Store’ Starts Rolling Out

Filed Under Nokia 5800 Applications, Nokia 5800 News

Nokia’s eagerly awaited ‘Ovi Store‘ launched today with a start from Australia, followed by few other countries. Those who have no clue what the Ovi Store is, its an on-device mobile application marketplace for applications, themes, ringtones, widgets, and other content for Nokia cell phones. In short, it’s Nokia’s very own version of Apple’s App Store.

Initial reports came from Australia few hours back where the Ovi Store found first available on multiple Australian carriers. And now it seems its also live in Ireland, Singapore and Spain. The buzz has started with this soft launch and the store is expected to be available globally in next few hours/days. Read more »

source: tube5800.com