The omake are very hard to find. Thought I'd help out.
The first omake was printed in the eighth volume. Is it included in the English translation by DelRay? I assume it is, but I don't have the licensed version of eight yet. Anyway, you can find a scanlation of the first omake here:
here . You have to join the yahoo group before you can download, but it's extremely easy to join.
The second omake was printed in the Caracter Guide. Pikari posted raw scans of it
here . You can find a translation
here .
The third omake was printed in volume
11 10. I have raw scans, but I don't remember where I got them. I believe I found them stuck in some raws of a chapitre I downloaded that weren't labeled to actually contain an omake; it took me a while to figure out what exactly they were. I don't want to post raws somebody else scanned without permission. PM me and I'll send'em. You can find a translation of it at the same website with the translation of the second omake.
The fourth omake was printed in volume 12. Raw scans can be found
here . It has a link to Pikari's site, which has a translation of the omake.
The fifth omake has yet to be printed in a tankoubon; it's only been printed in magazines. chibiyuuto on livejournal put up scans of it a few days ago
here. The scans he directly links to are actually Chinese scans, but if you scroll down the page a very nice anonymous person posted a link to Japanese scans. Also, the comments include okami_rei's translation of it.
Edit: the first time I posted it, it got all garbled. I've fixed it.