[Zimahl]

No there aren't.

No other penalty / liability against the notice server is provided for in the statute.

So are you going to ignore section f (Misrepresentations) which makes the entity providing the notice responsible for various penalties?

[dredmorbius]

My error.

Unless I'm misremembering, that was not a part of the original statute & was added later. The criticism I gave was fairly common immediately following passage of the DMCA.

[nitrogen]

(f) Misrepresentations.— Any person who knowingly materially misrepresents under this section—

IANAL, but those two words "knowingly" and "materially" are extremely huge caveats that should make it very easy to avoid any liability for carefully crafted false takedown notices.