Dealing with frequent disconnected states (replication) - advice needed

Hello,
We have a very complex environment and I was wondering if anyone out there in the SQL community had ever dealt with, or had ideas on how to deal with, this unique sort of environment.  We support two "homegrown" SQL Database applications over
a geographically dispersed area.  The remote locations are currently connected via T1s.  But, it doesn't end there...  At the remote locations, there are vehicles that are often disconnected for, sometimes, months at a time, where folks on those
vehicles are entering and accessing data from the applications.  We currently use SQL 2008 Merge replication, and, it works...  but, it, lately, has had some issues.  But, it DOES work... It just doesn't feel like the ideal solution.  The
way we have it now, our main SQL DB is in our main datacenter... then, at each remote location, there is another SQL server that houses a copy of the database using SQL merge replication.  Then, on each vehicle, we have servers that have everything on
them (they are domain controllers, SQL servers and web application servers) and, also on the vehicle is a laptop set up to access the application from that server over wireless.  When the server on the vehicle can see the domain and the DB server at the
remote location, merge replication handles synching those two.
Does anyone have a better solution to this?  I guess an example of our situation would be something like if NASA wanted to use our applications and they needed to be able to continue using the application even if they did not have internet or any, for
that matter, connectivity.
Thank you in advance for any advice/ideas.
Charlie

Merge replication was designed for this.
The question is where are you stumbling. You said it works, but now have some unspecified problems. What is the nature of the problems you are seeing? Keep in mind that merge replication is designed to be resilient to failures. I have some clients where
90% of their sync's fail, but the 10% that work replicate their data within the design parameters for the application.
I did have a client with 4000 subscribers hanging off one publisher. It worked well, but they decided to use XML diffgrams for their change detection and data transfer and run Oracle end to end.  This change was driven by problems they were having with
their data integration requirements.
NASA would likely implement a custom solution using open source technologies, because that is their way of doing business (at least with the part of NASA I have worked with).
looking for a book on SQL Server 2008 Administration?
http://www.amazon.com/Microsoft-Server-2008-Management-Administration/dp/067233044X looking for a book on SQL Server 2008 Full-Text Search?
http://www.amazon.com/Pro-Full-Text-Search-Server-2008/dp/1430215941

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