Adobe CS5 when?

Does anyone know or have a guess as to when Adobe will release Creative Suite CS5. When I got CS3, it seems like only months later they came out with CS4... I don't really want to upgrade to CS4 if CS5 is right around the corner, and it seems like with Windows 7 finally coming out, this could happen...
So does anyone know, or have a prediction.

PS. I am most interested in Illustrator CS5 but get the whole Creative Suite.

Thanks!
:D

April next year is a sound bet.

I can wait until April since my first priority is getting a new computer with Windows 7. Thanks!