Control talk time in N900?
 

Hi,

A friend of mine has an simple mobile, the Nokia 1208-1209, with a really cool capability:
"Control your talk time. Time Tracker allows you to pre-set call times and disconnects calls when the pre-set time is up" (copied from official specs in Nokia's web).

Surprisingly, I haven't seen it in any other model! Is there a similar application for the N900?

Thanks!