Just noticed it today..

Dim future repeating events
by Google

Make those important one-off meetings pop out. Your repeating events will visually fade out as you look out into the future.

Add any gadget by URL
by Google

Displays a box in the panel next to your calendar that allows you to add any gadget by specifying the URL. (Developers: learn more)

Dim future repeating events is a nice experiment! Don't know exactly how long this one is available but at least since a week ago.