From my research as a recent applicant in the match, and as a D.O., I would recommend what I was told by many people.
Try to match MD.
Volume, trauma, sick patients aside; your credentials as an ACGME trained resident will help you get credentialed at ANY hospital. Most DO trained anesthesiologists tell me that they knew going in that they will be restricted to small hospitals, usually in close proximity to their original training program. If this does not bother you at all, then full steam ahead.
I personally wanted universal credentials, wanted to be able to work anywhere. Also, once you train with MDs it confirms inside your own mind that you have been exposed and trained at the same level without any doubt.
Acceptance into the DO programs is weird too. I remember calling these programs, who each had separate applications and completely different application deadlines, and invariably it seemed like these spots were actually already fillled WAY in advance. Typical DO post grad training issues where if you went to school there, and they liked you, they might just offer spots out the match to their own grads. The MD application process seemed a lot more fair to be honest. How ironic.
If you are worried about AOA intern year acceptance, many programs especially in the state where an AOA intern year is required, they will customize your intern year to comply, and wa-lah! you are AOA approved, or dual-accredited, for whatever that is worth. Otherwise, you can apply retrospectively for AOA accredidation (sp?) if you so desire, and I have heard it is no big deal.
Hope this helps