I like the different approach of #51 and #54, but I think we are leaning more towards the P pin actually being part of the word Places. I love the font usage of Georgia on #44. I think its just a matter of finding the right way to make that P a pin, that looks natural yet pin'ish.
Would it be possible to take the concept of #50, and make the P the outline of the Pin? Basically with a slightly different color than the rest of the pin?