sql server replication: Bi-Directional replication is when a subscriber publishes back to the
publisher. You can only do this between two nodes, ie one publisher
subscriber pair. You need to partition carefully to minimize conflicts.

Queued updating using a queue (a SQL Server table or MSMQ). You can scale up
to about 10 clients - performance is not good after this. Queued updating
uses triggers on the subscriber and a tracking column.

HTH
--
Hilary Cotter
Looking for a SQL Server replication book?
http://www.nwsu.com/0974973602.html

Looking for a FAQ on Indexing Services/SQL FTS
http://www.indexserverfaq.com
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Can someone help me understand the what the differences are between the
different types of bi-directional transactional replication, i.e
1) bi-directional transactional replication
2) transactional replication with queued updating,

Thanks