Well, hello there. So you're trying to run Android apps under Maemo, huh? Well, there's obviously a couple of things you don't know yet. Under Android, you don't have X. Instead, it's using Dalvik to run everything, and Dalvik is a special JVM. The problem is that Dalvik requires a special kernel to access system functionality. And, unfortunately, that kernel is incompatible with Maemo.

The reason why Debian and Ubuntu work is simple:
They use X. When you see their display, you see a nested X server, a server running inside the existing server. It's not emulated, and runs side-by-side with your system. (You can manage processes that run in Debian from Maemo, f.ex.) The benefits are many, like great performance gains over an emulator. Mostly, they're based on having a chroot, a Linux system inside your system. Let it be a partition or a .img file like Easy Debian. They act the same way: as devices.

Now, back to Android, it's simple to set up the chroot and run basic commands. But it won't bring you graphics.
Your best bet is to check out how the SDK works. Unfortunately, the SDK only exists for i386.

And for the record... The "am" command is not present in NITDroid. It's for the SDK.