I have a recessed wall mounted one in my daycare bathroom. Saves a ton of space, I love it! I use a hanging mail sorter to hold the diapers for each child.
This is the table I have:
http://www.amazon.com/gp/product/B00...ZQGX5CSRVBE2FT
And pic of the mail sorter can be found in the slide show on this page:
http://first-friends.com/photos.aspx
I've also used a curved changing pad on top of the washer/dryer. It worked really well until I got front loaders with pedestals, which then made it too high for me.