AFAIK: There's no way to "hide" an app in the Android Market from some devices and not others. So if they release it to the market, it'll be installable by any Android device that uses the new Market. (Had to specify new, as there is some differences I guess in apps in the "new" market to the "old" market of the G1/Cliq.. at least so says my friend with a CLIQ). However, this comes with the caveat that: Just because it's installable, doesn't mean it'll work. So we'll have to see if it works on the Droid.

Rumored phones I'm not considering. They could come out with Dual-core mobile phones tomorrow for all it matters. I'm looking specifically at right now.. and apparently I've been a lazy bastard at researching phones since I got my N900. I had forgotten the EVO 4G and Galaxy S.

I very highly doubt the Harmattan device will be re-engineered to use a new processor released at the same time as when it comes out. I say that primarily because at the time the N900 was designed, the 256MB internal flash was all they had (in my understanding) - so even though there are better internal flashes now we still got the N900 with all it's rootfs size limitations because re-engineering it is out of the question.

So the Harmattan device will use something that was already on the market, likely I'm thinking sometime last year. But yes it could be a 800mhz+ Cortex A8 vice the 600 we have now. I thought, as I said, this was specified somewhere but I can't find it. I must be tired today.