Well, you asked for feedback, here you go.

r1v1:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v1.png
pretty straight forward; an anvil in a similar style as the seam logo

I like this one best
 
Overkill, unless you want it as tatoo on your arm
 
r1v2:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v2.png
A set of tongs holding a hot metal ball with a seam running down it.


don't think people will get the tongs/ball association easily
 
r1v3:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v3.png
An etching of an anvil with an 's' being hammered out. 

The anvil is to styled, if it is less styled, it is close to 1 (with 1 having the anvil in an angle/perspective is better)
 
r1v4:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v4.png
A phoenix in flames with the head of an anvil

no, see 1b
 

r1v5:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v5.png
a cup of hot metal being poured into the logotype


no, see 2
 
r1v6:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v6.png
Prometheus, known for intelligence, holding a flame stolen from the gods.

Say who?... just kidding. Don't think this is the right 'association'
 

r1v6b:  http://design.jboss.org/seamforge/logo/images/seamforge_logo_r1v6b.png
Prometheus bringing the flame to earth.

See 6, with this one being to vibrant

Cheers,

Ronald