Yesterday I presented PBXT: A Transactional Storage Engine for MySQL at the German Oracle User Group Conference (DOAG) in Nuremberg. A number of people asked for the slides, so here is the link.
The talk was scheduled to be in English, but since I had a German-only audience I presented in German. There was quite a bit of interest, particularly in the Engine Level replication built into PBXT 2.0.
As Ronny observed, this feature can be used effectively for many tasks, including for online backup and maintaining a hot-standby. This all with the addition of a "small" feature:
The Master could initially stream the entire database over to the Slave before actual replication begins. This would also make it extremely easy to setup replication.
A brilliant idea, but a good 3 months work...