Replacing your whole dinner service might be out of the question what with the scary economy, but for $6 you could give it a visual tweak, like this:
These Ceramic Decals from The curiosity shoppe are "steam, heat and water resistant," and apparently they're "guaranteed to last until you're ready to peel them off". If horsies (and other farm animals) aren't your bag they also come in these Leafy and Birdy patterns
If you're inspired by Thomas Paul plates but have some kind of strident objection to melamine, (or can't strech to them) then a couple of super-cheap white Ikea plates and a few packs of these would give you a similar effect
The decals apparently also work on Glass, tiles, mirrors and plastics.