If it's cheap and you can afford it then I usually say book it
Highly unlikely that any schedule changes will take place for October as that is still the summer timetable.
We booked our flights for February 2009 back in July 2008 and paid £57.24 per person in total ( including the card fee etc).
Flights for September 2009 where booked in November 2008 and cost £83.25 per person , I felt ripped off paying that much

, missed the launch of the new timetables by a few days so missed the bargains...
Looking back at old booking emails from years ago we usually paid about £50 to £70 per person by booking as soon as flights released, has been as much as £130 per person for us if we left it too long.
Will be booking February 2010 flights in a few months as soon as the winter 2009 schedule is released
The only problem is knowing when the new schedules are released as they dont send out the emails for weeks sometimes...
Maybe frequent fliers dont get the early booking emails as they know you will book anyway.
Mark