Josh, I'm sure just about any coral would grow if you glued it to the glass, but I'd caution against it for one simple reason... it will make cleaning your glass a nightmare.
It's a pain for me just to move my magnet frag rack whenever I do mine. I can see you bumping an sps almost every time and likely knocking it off or accidentally fragging it at least.
Of course, this only pertains to glass you intend to keep clean. If you put it on the back wall and you never clean that anyway... I guess that would be ok.
@Zippy & jgraz aren't you concerned that they may start to block flow on the return/overflow? Wouldn't it turn into constantly trimming them back to keep the water flowing? But it still would be cool to see.