In other words, can you set one to replicate daily, one hourly, one weekly against the same business class? (e.g Vendors)
Answers provided during the call were:
1. Yes, you can do this.
2. Delta's will be handled on a replication set basis (so each replication set will handle its own deltas over the set time period.
3. You can also disable the delta option and replicate the whole business class each time if you want.
You can have as many replications against existing business classes as you would like and they can each have different criteria and different fields. For example you can have a replication that replicates the audit log and one that replicates the current data, or two that have different criteria.