#2 - Love the concept, but please make it slightly more complex. Also, while the piano keys are great, it would be good to make it more obvious - any way of incorporating a box around the logo possibly to create the impression of a piano? As well, try a little colour - on the right track!
Re entry #27 - Nice contrast, can you play around with the background colours (i.e. white on black?). As well, can you remove the piano keys and give us a different logo?
For #39, can you please fill in the space in the "P" of 'Pollard' to make it look more like a piano (without going over the top!). As well, play around with the fonts and sizes of the words.