Mumble would be the shit in FH2 if a code god wants to take the time. Mumble allows you to do a direct communication to those in your squad as well as a relative communication to any and all those around you (not in squad and enemies). Like I said before it is possible if anyone wants the work. We already know that BF2 can communicate a great deal of stuff to 3rd party software. So how would this all work....
1. You launch FH2.exe
2. FH2.exe launches an FH customized mumble.
3. You log in and join a server in FH2
4. A master server is consulted on what server you have joined and if it has a mumble server to join.
5. You join the server and the mumble server in the unassigned (lets say axis) channel.
6. You can talk to everyone in said channel as well as people close to you through mumbles ability to track who is within your radius and adjust the volume.
7. You make a squad in FH2 and mumble makes a channel and joins you to it. Now using the "All talk" button you can communicate with all those in the area. You can also just communicate with those in your squad using squad chat regardless of how far away from you they are in game.
8. If you empty a squad or make a new one in FH2 the mumble server acts accordingly.
Damn sure this is all possible. Just would take a man to make it happen.
Played with this a bit in PR and I can say it is awesome. So much fun being separated from your squad and still being able to talk with others. MAG for the PS3 also has this and I had a great deal of lols talking with enemies during a firefight. If this was tackled it would be better then a Maus.