After looking at my race list, I decided to cut the gnomes. I have a lot of other races and figured that halflings filled the small niche. I decided to turn gnomes into an NPC race.
My idea was a cross between tinkers, garden gnomes and the creatures in faerie tales described as brownies or house elves. Tiny fey creatures who loved to build things, spoke to woodland creatures, and might break into your house and make you some shoes, if you were a good person who happened to leave some leather out.
Well, I described the idea to one of my players, who practically begged me to make it a player race. So I did. I call them Tinker Gnomes, and they're basically souped up regular gnomes with added abilities and a few drawbacks. I don't really know how playable they are, since they had originally been planned for flavor and not mechanical balance, but when my friend is done with her current character, she's all keen to try them out.