Do you have any plans of porting it to those platforms?
I can understand you're busy and you wouldn't have the time for it, or the resources for that matter. Have you considered releasing the source code under the GPL license? I'm not sure how that will work with your license plan but I'm sure it's a proven business model. Read this page for more information:
http://www.builderau.com.au/strategy/businessmanagement/soa/How-to-make-money-from-Open-source/0,339028271,339191343,00.htmI'm thinking you could for instance sell macro's to companies (on demand) and provide additional (paid) support. Or write a well documented help file to take full advantage of the program (the beginning's already there). I don't know but I think this program has the potential to become really big. I'll be sure to promote it. I might even be able to get my own University to install it on their computers in the light of RSI prevention. We'll see.
In any case, please do keep up the good work, and definitly put online a donate via Paypal / iDeal / Mastercard/Visa button online

. Trust me people who like this will want to donate.
BTW: I found this program because it was mentioned in the Dutch Computer!Totaal magazine:
www.computertotaal.nl/web/Artikelpaginas/Download-artikel/KeyBreeze-3.0.htm