Logic cross-grade offers

In the wake of Apple's announcement that it has acquired Emagic, and the subsequent discontinuation of development of Emagic's Windows line of audio software several companies have come up with "cross-grade" offers:

Logic to Steinberg Cubase SX ($299)
Logic to Cakewalk SONAR ($199) or SONAR XL ($299)
EXS24 to Speedsoft VSampler PRO (€40) (There's also a screenshot /animation of the forthcoming VSampler v3.0 on that page)