Here are some pics of growth in my tank. While it's not near as much as other people, I'm still impressed with the fact that I can get rocks* to grow in my tank.
Staghorn frag, and pink pocillipora frag Jan 2010
Staghorn frag, and pink pocillipora Aug 2010 (the pocillipora actually started out as a speck of 5, yes FIVE polyps on another coral back in sept/oct 2009)
Pink Birdsnest March 2010
Pink Birdsnest Aug 2010 (note the change in color after I swapped pc's to led)
Unknown Purple Acro March 2010 (notice it started to go green under pc's)
Unknown Purple Acro Aug 2010 (now all purple with darker growth tips)
Unknown Green Acro March 2010
Unknown Green Acro Aug 2010
Red Millepora March 2010
Red Millepora Aug 2010
Unfortunately I can't get the pics to reflect the true vibrancy of the colors (stupid camera operator-ME).
*Disclaimer--Rocks are actually colonial animals that build a skeleton of calcium on which to support themselves.