Peter,
What host operating system are you running you Domino server on?
The reason I ask is we offer SnapManager for Domino (SMD) for customers running Domino on Windows.
SMD utilizes the Domino APIs for application consistent backups.
It does utilize the Domino transactional logs, but requires them to be in the Archive style.
SMD also requires the use of SnapDrive.
Hopefully this helps.
Please feel free to reply or email me with additional questions.
John