Define "briefcase"...???
 

As a frequent traveler, I also applaud the minimization of carryons allowed, as I only travel with two, neither of which are gigantically huge (a Tumi Safecase computer backpack, and a 22x14x10 roller.)

Does anyone have an idea of what doesn't count as a briefcase? Do they mean that I must carry my laptop and documents and chargers, etc, in a small hard briefcase (circa 1960), or will a Tumi backpack or softside case be allowed?

I am worried about getting to the airport and having them force me to check one item, when I could have avoided it by changing my second carryon to a different style?

Any experience yet?

From the FAA site, subject to the whims of anyone that feels like it:
Each traveler will be limited to one carry-on bag and one personal bag (i.e., purse or briefcase).

I have been carrying a soft sided briefcase with my computer, cables, papers, etc, etc, (way to much etc) for about 8 years now. I do not carry a computer bag for a few reasons, they are too heavy and bulky and you can not put all your stuff in them. Hence, the multipurpose briefcase.

Anyways, I ramble. On both flights today, no problem. It is my briefcase and it fits under the seat in front of me.