You can check out his website here: http://www.martinmckenna.net/home.htm
While I'm on the subject, I'm also quite partial to Ted Nasmith's illustrations, particularly those of Middle Earth/Lord of the Rings. I even have three decorative plates with some of his Lord of the Rings illustrations on. I'm not so keen on his Lord of the Rings-inspired musical compositions though...best stick to the paintbrush, Mr Nasmith.
His website can be found here: http://www.tednasmith.com/
Who else...ah, how could I forget Jelly, my brother and faithful reading troll. He happens to be an illustrator too, and while he is still learning his trade he has produced some tasty genre artwork, such as this little gem below:
You can check out the rest of Jelly's artwork here: http://mideviant.deviantart.com/