Untap abilities

[serracollector]

Can the abilities that have the UNTAP symbol be used turn 1 if you had some way to tap them, like earthcraft, or is the untap abiity affected by summoning sickness as well?

[Yare]

A creature that has an ability with the untap symbol in its cost can't use that ability if it has summoning sickness. Of course, things that aren't creatures don't get summoning sickness.