Today I saw Twitter pushed past its professional limits. Pamela Rocco Von bLehmden/b, a Senior VP at Ketchum (a well-known PR firm) tweeted the following: Ketchum. ... Great blog, it reminds me of certain tweets by media companies (?our twitter expert is on bvacation/b this week?) that have been panned in the onine trade blogosphere. I would love to have an occasional blog,( ?The Cheeky Tweet??) on how online pubishers are using or misusing Twitter for news or marketing. ...