I noticed the checkrulesoncurrentrow does not get called on a Delete. I need to be able to show a broken rule or a popup error when the user tries to delete if certain conditions are met. What is the recomended method to accomplish this?

Thanks Trent. 1 more question regarding this. How can I determine if I am in delete mode inside my CheckRulesOnCurrentRow event? I want to check certain rules depending on wheter I am in edit, add, or delete mode.

I really don't know what you mean by delete mode.  Business objects do not have an editing state of Delete.  Now if you delete a record within the BO and the changes have not been committed back to the server, you can just look at the current rows state:

MyBO.CurrentRow.RowState = Deleted

But for this to show up, you will have to allow the deleted rows to be visible (property on the BO).