So I came to look who Mariko Takahashi was since raito-kun mentioned her.
Is ANN mixing something up here?
http://www.animenewsnetwork.com/encyclopedia/people.php?id=38090
There are works listed for some other shows. And it's also on the same year.
2006
>Kanon (TV 2/2006) : Key Animation (ep 4)
>(The) Familiar of Zero (TV) : In-Between Check (eps 4, 10), Key Animation (SSC; eps 4, 10)
2007
>Ayakashi (TV) : 2nd Key Animation (eps 1-3, 11), In-Between Animation (ep 12), Key Animation (eps 4, 7, 9-10)
>Lucky Star (TV) : Assistant Animation Director (ep 9), Key Animation (op; 4 episodes)