I am not aware of specific users of BlackTie on Solaris as yet although we would be more than willing to help you work through trying to get it building on that platform.
The main components to build are:
Log4cxx - http://marc.info/?l=log4cxx-user&m=114908626202067&w=2
ACE + Tao - http://www.dre.vanderbilt.edu/~isisbuilds/documentation/ACE_wrappers/ACE-INSTALL.html implies sun studio is supported out of the box
Apache Portable Runtime/Lib stomp - no direct instructions but as log4cxx works I would hope this could too?
xerces - http://xerces.apache.org/xerces-c/build-3.html grep for "Sun CC"
cppunit - http://forums.sun.com/thread.jspa?threadID=5390651
expat - no clear instructions here sorry! If this did prove to be non-working on Sun we could certainly look to alter the code that reads the configuration files as this is not a hude piece of code
For our own part, if you run the build and let me know any issues we will be happy to work around any issues. I think we exec gcc on linux but we can parameterize this (and the small set of compiler args we do use) for you no problem!
All the best,