Many thanks to Revitalizer and Christian for their helpful answers.
By the way, I just put together a new topic group on transaction handling for The Building Coder:
http://thebuildingcoder.typepad.com/blog/about-the-author.html#5.53
That should tell you absolutely all there is to know about this topic.
If not, please let me know!
Thank you!
Cheers,
Jeremy