E-bay Woes

I'm an E-bay fan...I've purchased many things on there, from a bridesmaid dress to collectibles. Until now, I have NEVER had a problem. I won an item off there on December 8. I paid via pay-al immediately - it was about $20, so it wasn't too much. Well, the seller has not acknowledged my payment, sent me the item or responded to my requests to do so. I'm almost at the ten day mark, which means that I can file a grievance with E-bay, but I don't know that I want to. The seller had 99.1% positive feedback, so I didn't think there woudl be an issue. Plus, the seller has recieved feedback over the last few days so I know they are shipping something out. What should I do???

Updated to add that thanks to Kaitie's suggestion, I have requested contact information and will call her tonight. Thanks! I'll keep posting on this saga!