Have you not read all the threads from those people that have "upgraded" to Belle that wish they hadn't, and are now desparate to go back to Anna?
Just seems to be a certain irony in it all, seems some will always want newer software, not listen to anybody else, then regret it afterwards.
I say before rushing to update, have a good read, because it will be quite unlikely most will be able to go back afterwards.
I'm one that will NOT upgrade to Belle.
I did not yet understand what kind of REAL improvements Nokia did by Belle.
For me it would be sufficient that Belle is able to read aloud email message but it seems that it is not still possible while it was possible by my old Nokia E51.
Well, RAM usage by Belle is far better, at least on Nokia 500. But C: memory still seems to fill itself over time with no any reason.