One of the nifty tools in 2009 is the catchment area. It is the opposite of the rain drop feature. It saves time especially when trying to figure drainage areas. I use the 2D option, so I can get an area. I haven’t played with the 3D option, as I think it would give erroneous areas since it basically drapes itself over the surface and follows every hill and valley.
THEN – I can convert this into a parcel and get a nice area label for my Drainage Area mapping.