No. There have been several. Don't forget about Zola Budd [at left ]. Jason Robillard was going to compile a list of all the barefoot runners who have won races.
Yes, she does still run barefoot, just not on hard surfaces. She says she still trains barefoot and will run on cross-country courses and tracks (not asphalt) barefoot to keep her feet strong. She doesn't race barefoot anymore though. After all, she is Newton's spokesperson.