I was just thinking to myself, that for such a rare metal that is so difficult to work with, it seems to be suprisingly common... Everyone and their brother seems to have adamantium this or that. But hey, thats just what I think.

Ok lets list some of them:
Wolvie
Cap (true adamantium = a little harder)
Ultron
Do u have more?

Isn't Colossus' armor made of adamantium?

Off the top of my head there is also Sabretooth, Lady Deathstryke, Bullseye (gets an adamantium skelington at some point I discovered the other day) and probably the Blobs pants.

Actually, not many have the vaunted metal.

Wolverine, Lady Deathstrike, Cyber(Deceased), Sabretooth, Bullseye(Spine), Cap(Sheild).

I may be overlooking someone, but I don't think many people have adamantium, crozie.

I got another metal for you that is not as "common": Uru (Thors and Betas´s hammers)

No!

No, its organic steel.

Cap's shield is NOT "true adamantium". It is a failed attempt at recreating adamantium. It is vibranium and some unknown metal that resulted in his shield. It is more durable than true adamantium though.

As for who has it:

Wolverine
Cyber
Sabretooth
Deathstrike
Ultron
Tess-1

I think I am forgetting someone here...???

Does Sabretooth have Adamantium? (Ultimate doesn´t count)

when and how did bullseye get his adamantium?

No, he is made of Osmium. In Marvel the heirarchy is:

True Adamantium
Adamantium
Secondary Adamantium
Osmium
Vibranium
Titainium
etc...

I think it is sabretooths fingernails (must make manicures interesting) and Im really not sure about Bullseye. My flat mate said something about kingpin nailing it to him or something. Was a bit vague.

You are forgetting URU!

Sabretooth's bones are covered as well.