Go go gadget super sneak…
To get Yahoo Mail Beta, switch your content preference to UK, France, or Germany. When you log into your mail area, you’ll be asked if you want to try beta. Then from the options menu, change your content preference what it was before. That’s it. If you are back to the old mail, go to options and click “Try Beta” button. Sneaky, eh?
Just to be fair, I’ll add that Google Calendar has launched at calendar.google.com.