I think the jpeg'ing may have been the doing of the website creators, though I of course, can't say that for certain.
Anyways, I try my hand at a lot of game graphics, tiles and such. So I practice a lot at making stuff tile right, like grass, walls and such. It seems Henk does a lot of stuff without really worrying about tiles, but just drawing one large image. Is that a good direction to go with when doing graphics for games nowadays, since the same limitations aren't in place anymore?