MeeGo requires SSSE3 support that is found in Intel Atom, Intel Pentium Dual-Core (except Yonah processors, also not to be confused with Intel Pentium D), Intel Core 2 or newer Intel processors. MeeGo therefore will not work on Intel Core (1) or older Intel processors or current AMD processors.
MeeGo also supports ARM7el processors.
MeeGo currently supports Intel chipsets apart from Intel GMA500. MeeGo does NOT support ATi/AMD or Nvidia graphics cards.
MeeGo does not ship with the closes source drivers so you will have to install the Broadcom drivers yourself. There is a guide written by Slaine, you will require a wired connection for this guide.
There are two MeeGo images, one comes with Google Chrome that requires you to agree to a EULA. The other image comes with Chromium. Both images also come with Mozilla Firefox.
The command line package manager is Zypper. This has replaced Yum.
No, You will have to do a fresh install.
MeeGo does not release images for each minor update. Download and install the 1.0 or 1.1 image and then install any available updates.
MeeGo does not ship with EXT4 support but a guide to installing it can be found in a forum.meego.com thread.
The MeeGo image is too large to fit on the N900's internal 256 MB memory.
Yes you can, see the dual booting Windows 7 with MeeGo guide.