I thought we were out of diapers around 2 1/2 years... Then we moved, then I was on bedrest, then the baby came. After lots of "two steps forward, one step back", I've finally decided to just wait for her!
She takes care of her own (infrequent) accidents during the day, and we take care of things together at night. But I got tired of being frustrated with her, so I don't make an issue of it anymore. I've read that this is common, especially if you have a family history of bed wetting...
Hang in there!