I bought a wool rug from Rugs USA (using a Groupon). It was very thick and dense with a relatively high pile, which is nice because we spend a lot of time standing on it while changing diapers, dressing the baby, etc.
http://www.rugsusa.com/rugsusa/rugs/sapphire-rugs-kids-handmade-wool/multi/D123416-5076.html