Curious thing I have noticed. In the description for Xploding Boxes at BlackBerry AppWorld, originally ended by saying…

In order to make this in-app purchase you must have version 2.1 of BlackBerry AppWorld installed.

However before the application was approved it was changed to…

In order to make this in-app purchase you must have version 2.1 of BlackBerry® AppWorld™ installed.

So no real change, but apparently RIM’s lawyers thought it was necessary. Personally however, I think that adding these (essentially meaningless) marks just clutters up the text.