I was just trying to log into the ATO Business portal, and found that I can't now, looks like the issue cropped up as of Snow Leopard and is due to some Java changes.

Here is the fix:

• Option click on the CSI Installer and select: Show Package Contents
• Then navigate to: Contents > Resources > jarfiles
• Copy csi.jar to:
  /System/Library/Frameworks/Java.VM.Framework/Versions/1.6.0/Home/lib/ext

Now you need to set the Java applet priority to 32bit:

Guess what! You can use multi-touch to switch tabs in Firefox 3.5!!!
It was enabled in the beta's, but it's disabled by default now that 3.5 has gone gold, but here is how to enable it: Read more »

One problem I've always had with Google services was the difficulty synchronizing them with my desktop applications.
When I was using windows I managed to get a calendar sync using Rainlendar which also works on OS X although it doesn't give you 2way sync with iCal, and incidentally doesn't play that well with PathFinder's Desktop. Read more »