It appears that the pricing for BizTalk Server 2006 R2 has been announced, see here,
although the main BizTalk
doesn’t seem to have the information yet.

It would be interesting to know where the new pricing for Enterprise Edition comes
from (35.000 vs 30.000 for BTS06 R1). I wonder if the licensing model is changing…
Traditionally, BizTalk licensing has been tied solely to the scalability and performance
possibilities of the Enterprise Edition (multiple processors + multiple servers per
group). However, I wonder if this is changing in R2 and Enterprise now also brings
features not available in Standard edition, because the pricing for the Standard edition
doesn’t seem to have changed at all!