I hate to sound pedantic, but how could everyone be hurting? When one listing moves down in the rankings and the site loses traffic, another listing moves up and that site gains traffic. The only way everyone could be hurting would be if Google's search traffic (and, therefore, total Google referrals) were down.
As for what I did when my own Google traffic was down, I discovered the likely cause with the help of several people on this forum (it appeared to be the www vs- non-www duplicate-content issue that has often been discussed here) and fixed the problem by implementing redirects in my .htaccess file. After about two months, Google referrals came back and have been stable or growing ever since.
Based on my personal experience, I'd say that members who are having problems with Google traffic should make sure the causes aren't close to home. Still, I'd be the first to concede that one person's experiences aren't universal. Some members may be losing traffic for reasons that are beyond their control, or that would require solutions which aren't possible with an existing business model or type of content that Google no longer favors.
[edited by: europeforvisitors at 5:25 pm (utc) on Mar. 17, 2007]