You're probably right, but Windows-only stopped me in my tracks too. I won't bother trying this, because the advantages over an Arduino mini pro (more memory, a snappy USB interface) don't seem to justify the pain of struggling with serial interfaces in WINE.

And although the vast majority of these devices will be going to big industrial users, if I was Cypress I'd consider the cost of developing Linux/Mac versions against the prospect of losing a generation of tinkerers to Atmel.