There's been some gossips around a possible branding of CS 2010 as Lync 2010.
There was even a blog, that looks like a hoax, talking about Lync. The blog does not have a lot of information and there's a few old OCS 2007 R2 screens as well so it doesn't look very legit.
But last Wednesday a RC of "Lync Server 2010" showed up on Microsoft Downloads and yesterday the Lync Server 2010 Planning tool (RC) was also released there.
I've tried the Planning tool and... it does look like a Planning tool for the new Communications Server 2010. :-)
Nothing has changed yet on CS "14" homepage but i've found this support page with a mix of Communicator, OCS 2010, Communications Server 2010 and Lync labels.
Now, i need to download and try that Lync RC. :-D