Firefox users are NOT currently being automatically updated (or prompted to update) from Version 3.5.7 or 3.6 Release Candidate 2 .... despite the fact that RC2 users will see 'Firefox 3.6' in the 'about' tab:
Firefox home page and download the update.
At that point, at least in Windows 7, it's a simple matter of running the .exe file and overwriting your existing version.
I currently have Firefox, IE8 (patched), Google's Chrome and Apple's Safari running on various boxes and hope to have a brand-new comparison next week (with some surprises).
As far as our mention of Seesmic's new Twitter interface yesterday, it's not at all what we expected. Watch for a walk-through and review this weekend.
Have a great weekend all ... and always, thanks for dropping by ...