I found on valve-erc a new tool ..

copy/paste=
Revolver is a new utility that allows you to rotate a 2D profile around an axis to generate a 3D solid. The 3D solid is then saved in the .MAP format, ready for you to import into Hammer and use in your maps. With it, you can create intricate pillars, rounded pipe corners, and much more.

the Link=
http://collective.valve-erc.com/index.php?doc=1051306877-75099000

check this out ,but i personelly use the hammer only :) !

Basically a sucky 2D editor that can only spin things. TYVM but I'll stick to Unreal Ed 3.0 when i want to do that and more.

LOL, right on beaver. Or until HL2's mapping system comes along.