I'll just write the status of the collages I maintain, delicious e-peen waving tiem:
Hitomi Nabatame: Needs a huge remake. On hold until I get my hands on Coyote Ragtime Show.
Mika Kanai: Reasonably stable after settling which characters go on what rows.
Miki Itou: Stable. Might have a few additions I've forgotten.
Miyuki Sawashiro: Stable, space left and I'm content.
Saeko Chiba: On hold.
Plausible future collages:
Hiroshi Kamiya: Idea toyed with. Lacking inspiration.
Norio Wakamoto: Same as above.
Satsuki Yukino: Started one, put it on hold when I saw one was made already.