Following on from the doom-mongering over RoHS, this is good news. It's also pleasing that RO5 development is still happening.
Perversely, I'm almost pleased that Castle are to charge for future upgrades too. We've had a lot of upgrades at no additional cost (I've had all 11) and the revenue from Iyonix hardware sales must have waned since the early rush. That may well mean a choice between establishing a new revenue stream from chargeable upgrades and cutting back on OS development. If that is the case, I hope sufficient people will be moved to buy the upgrades.