god, its like the honda forums with people asking about the rear disc conversion...every other day a new guy posts without searching....anyway...
as far as I know, mike's dohc conversion is on hold while he finishes his bodywork on his car, there's a few other people who come to mind but I cant remember their exact usernames on here and turboford.org, so not to make myself sound stupid, I wont quote names...
As far as I know, other than the people who have running dohc hybrids already, there's only one other person who's as far along as I am and dammit I cant remember his user name but I've got like 3 in my head lol.
anyway, here's my write-up on my progress if it helps you determine whether or not this conversion is beyond your means or not...
(be careful, it's geo****ties, and it's 4pages long thus far and you have to refresh a lot due to load problems, etc and it loves to exceed it's bandwidth....lol, but tis free to me!

)
http://www.geocities.com/_nitro_/volvoswap.html