Does the target for Double-Take replication require an Oracle license? Where would Vision Solution's Double-Take product fall with regard to Oracle Licensing?  It is both a backup and a replication of the database.  Oracle's Software Investment Guide has a section on Backup, Standby, Failover, and Remote Mirroring.  My concern is that this product would fall under remote mirroring and the server would need to be licensed.
We had a conference call with our Oracle Technology Sales Manager and an Oracle Solution Consultant.  We discussed the Double-Take setup and they were able to confirm that based on the way we have our DR site setup and our primary site licensed, we do NOT need to license the DR site.  This is of course assuming we do not deviate from the setup we discussed with them.  This somewhat surprised me and should in no way be looked at as an indicator Oracle's stance on Double-Take for any other installation than ours.