OODM: As I said nobody can pinpoint the location, So I'll just assume you search in different directions to speed it up.
Grenier - Message can be 1 person/lvl (Plus you), so if you wanted Abesh could include others in it, too. It's the best co-ordinating spell there is.
BTW, if anyone hasn't posted yet (I think that's everyone but Ariel, though) just post something like
"Last turn: Action
This round: Action"
IDM:
Father Antonio and Tal face north and east respectively, keeping their companions behind them so as not to inerfere in the spells, but neither detects anything yet.
Spook is looking around, too, but sticks close to Tal, who's getting a very distinct feeling of unease from his perceptive familiar.
Abesh, seeing 2 people concentrating magically the other way, sends his lights out to the Southwest while Thomas watches from above.
Gustaf awaits in the middle, ready to sprint in whichever direction his companions reveal to be where the sound came from.
Nobody has detected/seen anything this round, and it's still silent except for you.