My DD is almost 16 months old... I thought she was ready to drop to one sleep a few months ago however she was only doing 30 mins - we probably tried it for about 2 weeks or so (nightmare!!!)

I found once I put her down a little earlier it all seemed to "work out" again..

Curently our day goes:
* wake about 8am (lucky I know) breakfast, outside play with this fantastic little water table thing she received for christmas - she plays with it almost daily (I have seen something similar at ToysRUs for about $30) she will then walk inside herself, we watch the end of playschool together (sometimes she will have a light snack, depending how breakfast went) then milk and bed at 10am - 10.30am.
* lunch at 12 then an outing to the shops or a play at home, milk and bed at about 2.30pm
* snack, more play, dinner at 5.45pm big play with Dad when he gets home, bath at 6.30pm, milk (perhaps 10mins of a fave taped episode of playschool which she watches cuddled up to Dad - she loves the songs which DH and I sing along to and/or reading some books) and bed just before 7.30pm

I know lots of bubs have dropped that second nap by now, but at the moment this is working for me especially as baby number 2 is due in a weeks time (eeekk!!!!)