For starters, it doesn't explicitly say what are “qualified developers,” so it'll be interesting to see how they clarify whether a specific developer is a qualified one or not. In addition, there is no mention about which specific version that's being given out – or maybe they'll be given the option of choosing their flavor; GSM or CDMA.
Regardless, if you're an existing developer for the platform, it wouldn't hurt to send out an email to inquire more about this special promotion.
Palm Pre Plus Specifications | Review (CDMA)
Palm Pre Plus Specifications | Review (GSM)