One method that has worked very well is the backup and restore copies of the databases to various locations. Though this is very primitive, in a MOLAP environment this works rather well. Of course, space, size, security, and time considersations are all in play here, but if you can work with the downsides, we have found it to be very reliable for subscribers of "published" AS databases.
Another approach would be to use ROLAP and replicate your relational data using SQL Replication. AS2005 has some really cool features like event driven notification when new data arrives which can then spark updates of aggregations on your subscriber side.