I did a quick background check on these if you're curious.

The second one (of Diva) was done by Hidetomo Tsubura (sp?), the author of the manga series. It also appears to be in his style (Double-D Diva and all), and looking back, I'm pretty certain it was originally garnered from a site with scans of his artwork.
The first one, I recall, is from AIC's main page. They used to put up images with characters from their series on the front site, a new one every month or so. The artwork was always obviously NOT that of anyone originally working on the show...

This Makoto/Ifurita one was actually used in an AIC banner, too. (The only other "AIC main page" image I can think of offhand is the one with Ryo and Ken-ohki, Fancia, and a very cute Ura. Sort of a macot get-together).
The Rune one from OAV2 is from a piece of OAV2 box art (in Japan), and the one of Makoto and Ifurita "reuniting" is definitely from a piece of official art and cropped from a larger picture. I'm tempted to say it's from a Japanese LD pull-out, but I can't remember for sure. The original looks like a mini-comic of the whole cast.
The Alielle "Peace Sign" one I can't identify, but it looks like it's most likely from a doujinshi (fan comic) cover to me (since these are sold on an open market, it's always been a shady issue whether these can be used or not). The last two are pretty definitely fanart ('specially the Alielle one, but the Jinnai and TV-Iffy one also), so, erm, don't use 'em. *cough* *ahem*
As for the use of the rest...I don't know, to be honest, what the procedure would be for that. I really just wanted other fans to have a chance to look at them, since I haven't seen them online for awhile. But, I've heard Japanese fan artists talk about how they don't consider putting
official images from a show to be "fair use". So, I don't know. I would say the fanart ones, probably the fan comic one as well, are off-limits, though (and I'll debate the morality of putting official images up later since, to be honest, I've always used 'em myself).

Glad if anyone likes looking at them, though. I'll take the page down soon.
