I don't know if it's casuality, a mail problem or if Gmail is jalous and worried for the new Windows Live Messenger 8.0, but these are the facts:
Today Jan Tielens has sent me an invite to test the new Microsoft's Messenger to my Gmail account. I've checked the invite message and (surprise!) the "Download Now" link was unclickable. Blocked by Gmail?
However, I've checked the HTML source of the message and I've found the link to activate my account and download the new tool.
First impressions? Nice new interface, wonderful feature for VoIP conversations, possibility to save and import contacts. I've to play a bit more with it...