I bought a vanilla vine from a lady on eBay a few years ago, and she threw in this orchid. When I asked her what it was she said she didn't remember what she put in the box.
Here's some photos and hopefully someone will know what it is. Blooms all summer long, often until Dec.
I had pretty much given up on orchids, because we had killed some really nice ones, but this one seems to thrive on neglect! (don't cry, Boojum)