[Maarten88]

> Does Microsoft have an open messaging protocol that I don't know of?

Even better, they support an standard called SIP. [1]

> Or an open source operating system? Or an open source browser?

They believe in open standards more than open source, although the Azure group very actively supports open source lately

[1] http://en.wikipedia.org/wiki/Session_Initiation_Protocol

[kalleboo]

> Even better, they support an standard called SIP. [1]

Not in Skype they don't

[Dylan16807]

To be fair they bought skype and haven't really changed it. Which is actually an improvement over the previous company that kept removing things.