@aL_:
Agreed, if MS leave this capability available to those who haven't paid the $99, it will mean GREAT things for the platform.
Now I can tinker with code for use within my department at work for example, and put it on other handsets of other staff - that was going to be too expensive to just play around with before (I assume through the $99 means you can only unlock 1 phone?).
It has nothing to do with piracy, but everything to do with getting people writing code for the platform - and to be honest - I dont understand why this functionality isn't available for everyone anyway.
If someone who had no intentention of selling apps via the marketplace is now able to do this, who knows, maybe they will realise the app they have made for themselves is actually sellable and pay the $99 to get it out there.