[Asterisk-Users] Directed pickup syntax?

[Rich Adamson]

What's the proper syntax for implementing directed call pickup?

Running cvs-head from today (9/24/05 including Mark's fixes), and 
tried:
 exten => *99,1,Pickup(${EXTEN:3})

but that does not seem to work, and there isn't an example in the
configs directory. 'show application pickup' suggests the above
should work with our sip phones, but apparently I'm missing
something.