hi - sorry for the delay ...
have trawled thru old favourites list and found not as much as i had imagined was there
but, have come up with the wikipedia entry for montessori, which ive read through and think is pretty comprehensive.
i also found information.html&num=1this which has a listing reference, but is a little sparse otherwise, from a parent point of view at least.
having read the wikipedia one, make an appointment to go and see your local preschool and see how you feel about the place. is worth going to lots of places, even if you dont think they are 'the one' (all sorts of nurseries, not just montessori) to build up a picture of whats on offer and have a reference point.
btw - as far as i know, nurseries which are called day nurseries do the long days from 8am till about 6, usually split into 2 sessions, to allow parents to work. generally speaking preschools, nursery schools and montessori schools do much shorter sessions of about 2.5 hours each morning and afternoon. most will ask you do pay for a minimum of 3 sessions per week, which is a good place to start from, but all children are different.