NEW Firmware update v30.0.009

In 31/5/2010 Nokia announced the new update for 5530 !
From 9/6/2010 it is available to the public  
You can update either with FOTA or NSU

the changes are :
- adds the shazam application
- adds the OVI sync application
- now kinetic scrolling is everywhere ! even in the after market apps and smoother than before
- music player with renovated style (the scrolling runs so fast !)
- internet explorer with kinetic scrolling and automatic fullscreen after some seconds !

tell me to add more if I forgot smth . I suggest to update for better support . No problems with the install (at least for me   )    

FOTA: Firmware update over the air
Go to the keypad and type *#0000# it will show you the current firmware . then press select and in the pop-up window press "check for updates" . make sure to have unlimited plan for the 3G (135mb will be downloaded) or a Wi-Fi connection .

I suggest updating with the other method with Nokia OVI suite

No you cannot roll back .But you can reinstall the latest FW as many times as you want . make a backup and update it .it's highly recommended