Plastic extrusion time lapse: http://www.youtube.com/watch?v=ST_DWJeUGmI
FDM printed gimbal; lots of post-processing: http://www.youtube.com/watch?v=Ak03wmi-3FE
Invisalign SLA, start at 4:05: https://www.youtube.com/watch?v=vsR0_wTR2a8
DWS Stereolithography, start at 1:22: http://www.youtube.com/watch?v=FAcyKpLMJUY
Doob will make your avatar: https://www.youtube.com/watch?v=YtiXPrR4-b0
Z-printer 650 colored binder + powder: start at 3:08 http://www.youtube.com/watch?v=7QP73uTJApw
binder+sand -> Digital Sand Casting: 7:40 http://www.youtube.com/watch?v=Z8MaVaqNr3U
3D metal printing: https://www.youtube.com/watch?v=i6Px6RSL9Ac
Shapeways demo objects (powder/laser) 10 mins: http://www.youtube.com/watch?v=DActj__h3SI
Form Labs $10K Fuse 1 SLS sytem prints nylon: press release
IMPALA Project: powder bed and sprayed powder jet, 8 mins: http://www.youtube.com/watch?v=fQjgHszJVLs
Image: http://machinedesign.com/materials/additive-manufacturing-comes-metal-foam