I am also interested in any replies you receive on this one.
I had looked at the Rieco-Titan dolly, but after thinking about it, I believe I will build my own when I get my 1st truck camper this spring.
Here is the one that I like, from an earlier post on this forum: http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/18622123.cfm
I'm thinking of getting 1250# weight limit heavy duty casters - 2 fixed position ones for one end of the dolly, and two swivel casters for the other end. I've also been thinking of carpeting the top of the dolly.
John