There is an SNS discussion on Flicrk at:
http://www.flickr.com/groups/hdr/discuss/72157622648650562/
Where I and others have pointed out some significant problems with the engine, specifically the generation of wierd noise or artifact patterns. The progam author had participated in that discussion. He promised updates to the program, but about 2 months ago he disappeared and has not been heard from since.
Being a one-man operation, I suspect he ran into problems beyond his capacity. Perhaps he will resurface some day. But for now, the noise/artifact problem is a kiss-of-death for many.
Similar situation on the Oloneo HDR program beta. Promised release not met, beta extended to November 1. No word from the author on status or intended price, yet only 5 days remaining on the beta.