I have busybox and bash on my android phone, how is it not the same at all? That's why they call it GNU/Linux. Linux is the kernel, and GNU a set of tools and libraries. Right now Android has the Linux part, and the GNU part is increasingly available.
Not that I disagree, but X11 would be nice.
Damn I miss my N900/N9....
By the way have you heard about the Linux on Android project on Sourceforge? It enables you to run a linux distro on your Android phone via a chroot hack. Seems to be working very well, but I have not tried yet.
If you miss your N900, you can check what is happening with the Open Pandora device, and use your phone to theter your internet connection to it :)