I think the original approach, taking a chain saw to cubicle walls was correct, but I have concerns about the electronic substitutes listed at the end of the article.

As a manager, get your people moved to a common area and reconfigure the cubicle walls to create a bull pen work area. You may have to rely on the the "It is better to ask for forgiveness than permission" principle, but you can make it happen. Facilities and HR will rarely help you make these type of changes, but they are also not going to expend effort to undo them once in place.

Establish a war room or at least a "war wall" where all significant information is posted on whiteboards or on bulletin boards. Verbally announce things at frequent staff meetings rather than sending all hands e-mails - people are much more likely to pay attention and ask questions. Encourage face to face meetings and discourage e-mail exhanges. E-mail and IM can work effectively, but they can also quickly degrade into flame wars. Face to face discussions are the best way to handle disagreements even if you, as a manager, have to occassionally sit in and play referee (sorry, I meant to say "facilitate").

Do everything in your power to encourage an open working environment and only use technical solutions where a low tech alternative is not feasible.