Must a Form 4 be filed in connection with the award of non-vested restricted stock units (i.e., no actual issuance of shares unless and until vesting criteria are satisfied)?

Since it could be that the grant of the non-vested stock nonetheless is a beneficial interest, I would say file the Form 4, both now and when the vesting occurs, since that is when there might be a pecuniary change.

That's just plain rude, Mr. Wallach.