If you're like me and have never used IRC before, don't be scared.
Just choose a nickname, type in #nvbeta in the Channels field, and during work hours and work days PST, Newsvine Staff - or at least, I - will be present.
The Contact form is still the best way to reach us, though.
UPDATE: 7/26 noon PST: Newsvine Staff may be present in IRC. No guarantees. Use Tender for Beta discussions for staff's eyes, and Tender or Report a Bug on the Contact form for bugs.