Yes,
I already placed an order for mine at my local hobby store. He told SIG that he wants his name on the first two they can give him, so I'm looking forward to getting mine. I recently bought the large Sun Dancer Bipe ARF and the workmanship is absolutely stellar.
However, I should point out that I put my order in for a SIG Little Something Extra ARF in October 2004 for a December release, then January, and after quite a few deadline push-backs I finally got my Little Something Extra ARF on April 14th, about 2 days ago. Like the workmanship on my big Sun Dancer, worth every minute of the wait. As I'm sure the Sun Dancer .50 will be.
I have a Saito .56 that I'm thinking might fit the Sun Dancer nicely. Is the .50 in the Sun Dancer for a 4-stroke size or for a 2-cycle? If it's for a 2-cycle the Saito .56 might not be enough. I can't remember if I have any Saitos in between the .56 and the .91's I have around. Guess I'll have to do some digging around in the engine storage box.... I'm into regular flying and aerobatics, not into 3-D, so maybe the .56 will be enough to make it do what I ask of it anyway. Looks like I'll have enough time to work all that out.
Off to find a thread about the Little Something Extra ARF! Then I'll probably check out the SIG site for info about the new Sun Dancer .50 ARF if it's there yet.

Jimbo