There seems to be a number of Resonator guitars available these days. Perhaps we can get up a list of them. I know of:

National Resophonic models: There is a website for them at http://hmi.homewood.net/national/guitars.htm

Gibson/Epiphone Spider and Bisquit and Gibson Dobro: There is a website for them at: http://www.gibson.com/products

There Seems to be a Johnson Resonator of which I know nothing.

Then there is the Samick I saw. A site for Samick is given by Earl in this thread a few posts ago; but there doesn't seem to be a resonator listed there.

Then there is the Regal. This might be another incarnation of my Samick as might be the Epiphone bisquit.

I think JonW mentioned an even cheaper resonator in a thread about either delta blues or bottleneck blues; but I can't find the posting. Do you recall Jon?

More?

Murray