bidirectional snapshot replication?

I currently have a list of users in a SQL 2005 database. Users are
authenticated based on their email address, and each user has a number
of areas they do and don't have access to. A website is used to add
users to the database, or to add area permissions for an exisiting
user.
I would like to set up a number of replicated servers around the world.
At least one would have very high latency and very low bandwidth to it.
All Sites are connected by VPN.
My question is: Is there a way to do bidirectional replication between
all of the servers? All servers would ideally be both publishers and
subscribers.. If so, which type of replication would you use? I was
thinking snapshot replication twice a day, but that may not make
sense..
Thanks in advance..
Have a look at peer-to-peer transactional replication - this sounds like
what you require.
Cheers,
Paul Ibison SQL Server MVP, www.replicationanswers.com .