It's been a while since I've read the v1.0 history. From memory, I think that most of the remains of the Austrian army get absorbed into the Unified German Bundeswehr sometime in late '98 or early '99 (Fourth Reich, anyone?
). IIRC, by summer 2000, most of the Italian army has been kicked out but there might still be some hold-outs in the south of the country. There might also be some PACT units in the eastern and/or southern part of the Austria- Soviets and Czechs, mostly. I think one or two American units are listed as being in Austria as of the summer of 2000. I'm not sure if they leave in the fall after Operation Omega gets under way.
With all of the above-mentioned "factions" as well as your former PACT and NATO marauders, Austria strikes me as being a potentially very interesting European campaign setting.
EDIT: I just checked and the following
U.S. Army units are listed as being on Austrian soil as of July, 2000:
U.S. 35th Infantry Division (Mechanized) near Linz- strength listed at 2000 infantry and 23 tanks.
U.S. 43rd Infantry Division near Innsbruck- 1000 infantry; 10 tanks
U.S. 1st Brigade, 40th Infantry Division (Mechanized) near Telfs- 400 infantry; 6 tanks
The following
German units are also listed as being in Austria c. 2000:
1st Panzergrenadier Division near Worgl- 2500 infantry; 500 cavalry; 6 tanks
10th Panzer Division near Grins- 4000 infantry; 31 tanks
I'm still working on plotting PACT units south of Czechoslovakia.