Absolutely, we need this. More and more of my co-workers are joining. I don't want to have to sensor what I share with my best friends because the guy in my office has no business seeing it.
"email is probably easier on the blackberry or mogul than accessing fb messages"
I use Facebook's mobile website all the time from my Motorola Q smartphone: http://m.facebook.com. It's not quite as easy as email, but I wouldn't describe it as painful.