Hey, Shawn,
I did a quick test, because I was curious myself, and I was able to do so. I took one of my class files, added a 2nd namespace, and was able to access functions from both namespaces.
There was a thread about a year ago on this...thread #
779032.
I'm not sure I would want to try this for UI class controls, I would wonder if it might get confusing, but I see in your example it was for some SQL code.
Out of curiosity, what prompted the need for multiple namespaces? (I've never tried them, so was just curious why you wanted to use them, if it provided any benefit, etc.)
I talked to Bonnie about this, and we were trying to think of any gotchas or problems, though for anything non-UI, we couldn't immediately come up with any.
Kevin