Rotate a 2D cross section to make a 3D object I have zero 3D modeling skills and this is a very, very basic question - please bear with me.

I have a 2D drawing (I made it in Omnigraffle so I can export all sorts of formats - SVG seems most helpful, but I am naive).

What I want to do is to spin the drawing around a center line to make a 3D "top hat" like object. The result is to be given to Shapeways.

This seems super, super basic, but I lack the vocabulary to even formulate a reasonable google search to learn how this can be done.
Thibsert's answer is fine, but if you're using mesh already you can use the Spin tool from the Tool tab in Edit Mode. The number of degrees (Angle) needs to be set to 360 and you need to find the right axis and enter 1 there instead of the default 0