2. People have alluded to workarounds. But I'll add a comment:

I've added apps by (a) using a few other Android marketplaces (just not THE Google Android market place) that you can access from the edge. There are lots and lots of apps available on SlideMe and AppsLib and other places; and (b) finding the individual .apk file for the app I want either through a Google search or from someone who has an Android phone (and therefore access to the market) who would upload/email the file. Except for one particular app that I was very intent on getting (and before I knew someone with an Android phone to send me the file), I haven't noticed lack of access to the market to be a huge barrier.

I don't run an emulator (ie a program on your computer that simulates an Android phone so that the marketplace thinks you're accessing it from an Android phone), nor do I have an Android phone, and I have lots of apps. Access to the marketplace would be a lot more convenient, but it hasn't proven to be a deal breaker for me.