FB amended their S-1 to lower revenue forecasts. Following that, a research analyst at Morgan Stanley cut his revenue forecast on FB close to their IPO. Nothing here should fire anyone up.
Equity research must be conducted independently of the investment bankers' non-public information. Given that they are opinions assembled from public data I don't see how disclosing it only to clients is a problem. If you want to publish a newsletter with stock tips and only disclose it to paying clients that is your prerogative, too.