I haven't had much time for DU news updates recently but Shoutime made me cream my jeans so... He got the following, and more could be on the way.
Macross II proto - service pauses the game SD Gundam Neo Battling proto Ultra X Weapons proto Brave Blade proto Asura Buster proto - has pause functionality on 1P Button 4 Developer version G-NET mobo with V1.02J Shikigami No Shiro installed, strangely dated later than the V2.03J in MAME. Shiki has some alt sound effects.