Settop Boxes (MIPS): http://www.mips.com/android/ (There's also a new MIPS chipset aimed at smartphones: http://www.h-online.com/open/news/item/Android-mobile-device...)
Netbooks (Intel): http://liliputing.com/2010/08/toshiba-ac100-android-netbook-...
And then there is the whole Chinese ecosystem of Android (and Android forks?) on Loongson processors. I don't know a lot about this, but here's an example: http://www.netbooknews.de/12409/lemote-open-source-netbook-m...
When taking iPhones into account, you must build for ARM6 and ARM7. On Android and native code, situation is the same: G1/myTouch is CPU-wise another ARM than Nexus One, which is different than Galaxy S.
The bytecode solves nicely this problem now, as in You Needed It Yesterday Already.
Processor portability? YAGNI.