Now that BizTalk Server 2009 is RTM the version number overview table that I posted earlier (here and here) can be updated.
The new table:

Product name
Service pack
Version number

BizTalk Server 2004
 
3.0.4902.0

BizTalk Server 2004
SP1
3.0.6070.0

BizTalk Server 2004
SP2
3.0.7405.0

BizTalk Server 2006
 
3.5.1602.0

BizTalk Server 2006 R2
 
3.6.1404.0

BizTalk Server 2009 (beta1)
 
3.8.104.5

BizTalk Server 2009

3.8.368.0

As mentioned in the previous post this information will probably also appear in […]