Philipp Lenssen has found an article which contains some great sleuthing done by Paul Stone. He has uncovered a link that clearly states a calendar is on the way -- and at the same time found a brand new feature Google has been working on. His discovery takes us to a page called "Google Links" where you can personalize a small bar containing links to popular Google services. I have been snooping through the Gmail source code myself in the recent past, and have not found anything like this before. I can say with some certainty it has just shown up within the last week.
When "Google Links" is launched, this bar will probably appear on all Google pages -- with the goal of making it easy to switch from service to service. By default there are links for Google, Gmail and CL2 (the name for Google's rumored calendar service). I have long said that they do a terrible job cross marketing their many services, but this feature will definitely help.
The most exciting part of this discovery is that "CL2" will be on the links bar by default. Until now the name "CL2" was unknown and to many people a calendar service was simply a rumor. The description on the links page for CL2 ("A calendar for you and the world") can put to rest any doubts that Google is ready to release one in short order. When visiting the link, you are taken to a login screen. Unfortunately it must be only available to trusted testers because logging in doesn't work. This is the beginning of some exciting new services from Google.