Mobicents Sip Servlets has moved to Mobicents.org !
As of 28th April 2008, the project has definitely moved to mobicents.org where the complete Mobicents Platform (JAIN-SLEE, Media Server, Open XDM) is hosted :
The source code has already been moved to google code and is accessible at http://code.google.com/p/mobicents/source/browse/trunk/servers/sip-servlets
for browsing or at https://mobicents.googlecode.com/svn/trunk/servers/sip-servlets for checkout
sip-servlets.dev.java.net will stay as it is for historical purposes but won't be updated anymore. It is now recommended to use Mobicents java.net user and contributor forums or mobicents-public google group for further communication with the team depending on your needs.
Please visit http://www.mobicents.org-a.googlepages.com/products_sip_servlets.html and give us some feedback.
Again, sorry for the inconvenience.