hahahaha! mistype. That sounds pretty interesting. I ran a Key variant once that was sort of like that, but Italy didn't have to borrow Trieste.
http://webdiplomacy.net/board.php?
gameID=15404#gamePanel
Here's the hear of it in 1901: Ven-Tri-Ser while Austria moves Bud-Ser-Gre. This gets us a build a piece. Meanwhile, Austria is free to move Vie-Gal or what have you for a possible second build. Like the orient express, we trade material for tempo by moving Nap-ION-AEG or EMS! while Austria moves Tri-Alb-ION!. Finally Rom-Ven-Apu as part of a double move, set up for convoy.
It requires the most iron clad of trust, but why not... You're the weakest two powers on the board. Don't kill each other.