musumenavi.jp added one more date to Morning Musume Spring Tour 2009 and also added a concert title that seems to be the 9th album title as well.
(1)モーニング娘。コンサートツアー2009 春 〜プラチナ 9 DISCO 〜
出演:モーニング娘
会場:横浜アリーナ(神奈川)
座席:全席指定
●公演番号01
5月9日(土)開場/開演:13:00/14:00
●公演番号02
5月9日(土)開場/開演:17:30/18:30
"Platinium 9 DISCO" seems to be the name of the tour and therefore will probably be the name of the 9th album too. The new dates are two concerts on 5/9 in Yokohama Arena. Previously, the concert's last gig was 5/2 in Osaka but it is not common to end Spring tours on small venues, so this was expected to be dropped later, like Up-Front's always does. However there is no envelope confirming this from UFA, but there is musumenavi.jp, reliable 99% of times.
As soon as someone reported on 2ch the talk on a possible graduation started.
It's Ai-chan's turn. It could be her.
Risa is from Yokohama. It could be her.
Junjun and Linlin are on a study abroad. It could be them.
Reina has been promoted to the front-line. Solo anyone? It could be her.
Sayu's popularity is raising. She could go celebrity-only idol. It could be her.