今天刚发布的，在国外网站上看到这样的消息，后来在微软官方网站得到了证实。
以下是原文内容：
MSN Messenger 7.5.0299 final released!
Zero1 says:
Microsoft have released a final version of MSN Messenger 7.5 (7.5.0299) on the public MSN Messenger site. Official information seems not to have been updated yet as the site is still displaying MSN Messenger version 7.0.
Some of the new features that have been incorporated in this updated version are the ability to add people, start a conversation, start a video conversation and start a voice conversation via a link in a webpage. The links are constructed as so:
Start a conversation: msnim:chat?contact=contact@hotmail.com
Add a contact: msnim:add?contact=contact@hotmail.com
Start a voice conversation: msnim:voice?contact=contact@hotmail.com
Start a video conversation: msnim:video?contact=contact@hotmail.com
Some people may notice this feature is similar to AOL Instant Messenger’s link system. However, people who remember the workaround that was made for MSN Messenger 4 & 5 will appreciate how much simpler this is to implement in their own webpages.
Also, the quality of audio over MSN Messenger has been improved and better echo-cancellation implemented.
