It seems like there a source for geodata available of bus and train-stations we just have to find the source.
I see it as very important to have busstations available. Just imagine how many data your would gain by importing such information to the map.
So if somehow possible we should contact the owner of this webpage, asking him to import his data to the map itself.
Isn’t it great to see the results of having busses and trains added to the map for example for London: http://www.öpnvkarte.de/?zoom=11&lat=51.52691&lon=-0.16454&layers=BT
For example there is a group of people having developed android applications based on such a data: