Docs have not yet been tagged for stop loss. The operative word, however, is "YET." Like you, I am hoping to ETS in June 06, but I do wonder what the command is going to think when they see how many docs are splitting this coming june ('05). I won't be surprised if there is some kind of stop loss put into place by the end of this year (if not for all docs, then maybe just for "critical specialties" -- i.e., surgical). There are no "rules" or "specifics," and forget about finding anything anywhere in writing. Even if it's written, it can be changed based on "needs of the Army" (I'm assuming you're Army, if not, substitute Navy, AF, etc).
As for deployments, there's a lot of variables: your branch (army, navy, AF), where are you assigned, what's your specialty, are you PROFIS and to what unit, etc etc etc. I've heard through the rumor mill that the next big round of deployments will be in the September-October timeframe -- still able to screw up a planned June 06 ETS (unless you get lucky and only go for a short tour, as some people have).
The other thing I've heard, and perhaps someone can confirm or squash this one for me, is that if you've got less than a year on your committment (i.e., in your case if you haven't gotten any deployment orders before July 05) you won't be tagged for a deployment during your final year. Again, just a rumor, I have no idea if it's true or not.
RMD 1-4-11