From my experience with ubuntu alpha 2, 3, 4, 5, 6 , i will not install 9.10.
Grub 2 is not ready and really looks bad. I don't think it will be ready for a beta version. Anyway, who needed grub 2, some smart and stupid geeks working at the Linux development ???? They are always right. For sure they are genius (so they think).
I'm a user and you are wrong(stupid geeks) and you are fire.So is Ubuntu 9.10.