Dave McLaughlin 
Apart from the compiler and tools to build Android on Linux, there are 3 tar files that come are supplied on the DVD and you extract these to create 3 directories. Below applies to the mini210. The first is the Linux kernel and I can build this successfully. The second is the Android-2.3.1 and again, this builds without any errors. After Android is built, you run genrootfs.sh to build the rootfs_dir directory in the Android-2.3.1 directory. This works but the rootfs_dir is only around 24.9MB. Seems too small. After this you use makeyaffs2image and I then get rootfs_android.img file which is around 18MB which again is too small. This leaves the third directory called rootfs_android that holds around 180MB of files etc. At no stage in the build does rootfs_android appear to get used and I was wondering if anyone has any clue to its use? I have not tried to use the image it builds because is way smaller than the 180MB file image that is supplied on the DVD. I have however experimented with copying rootfs_android to rootfs_dir by modifying the genrootfs.sh file and now after building I get a 182MB image. I need to get clarification on this as nowhere on the internet can I find out about this. Cheers Dave...