Hi fellow BB fans...
I was searching for an OS update for my Bold and came across a website which I found useful.
It is called Blackberry OS Version Tracker (blackberry.diagelic.com)
It has an updated list of the latest OS release for each Blackberry model and there are also links to download them (the green download button)
Here's a screenshot: screenshot.jpg
Anyway, seemed to work ok for me
... hope this is the right place to post this - I'm new here...