Filling a gap between two edgeloops? 2.51

Here is one basic question again.
In many 3D apps, one can select several edges of a mesh and shift select the same number of opposite edges, than hit the hotkey to fill or join the parts.
That, surely must be possible in Blender… but how? ctrl+F doesn’t do it. :frowning:

Not yet brought over from 2.49


Ah! Hum! Right! I had to proceed by hand… about 40 edge - F - edge to clic down… :o