Author has written 10 stories for Warhammer, and Mass Effect.
I have mainly used this place in the past for Warhammer 40K-related stuff, although note that if you're looking for 'exactly like cannon', then they probably won't be for you. That said, at the moment, I don't really see myself doing any more 40K stuff for the foreseeable future. Unfortunately 'The Misfits' in particular has a logjam of problems sat underneath it (witness the collapse in quality of the more recent chapters) and I have no idea how to disentangle them :( Sad but true!
In addition to the Warhammer stuff I've also posted some Mass Effect-related fiction. These range from pretty crack-y to fairly serious. ("Sideways to Zero" in particular has a bad case of Big Ideas Lurking In The Background; probably why I'm making so little progress on it!) One of them - 'Convolution Kernel' - is a surviving chunk from an 'alternate end' for ME3 that I was cooking up at one point.
I do try to keep up to date with my correspondence, but I've had some issues with my email service eating FF ones. So if you feel you should have had a reply from me by now, you're very probably right, and please accept my sincere apologies!
Anyway, I hope you like my stuff. If you do, please feel free to comment.
I also have an online gallery which has some 40K and Mass Effect-related artwork on it, too, that being here.
I also have a public blog, where I (occasionally) talk about fannish things; that's davidnm2009 over at Wordpress.