The response was literally overwhelming, forcing us to temporarily close the beta while we worked with our hosting provider to add server capacity. We had no idea how much capacity we might need, and since we were (and are) totally self-funded we didn't have the money to simply lease racks of servers to find out.
Luckily, ServerBeach proposed a solution that would let us overbuild, measure our usage, and then pay for only what we needed. Without their flexibility we might never have gotten off the ground, and for that we will always be appreciative.
Only after we got the additional servers online and reopened the public beta did it become clear just how much demand was actually out there. Our traffic has been growing ever since.
Six weeks later we launched Spanning Sync v1.0.
At the time of this writing, 58,656 people have synchronized their Apple iCal and Google calendars using Spanning Sync. We've learned a lot about iCal and Apple Sync Services, Google Calendar and its API, and managing an online business that's growing at almost 10% per month.
We're hard at work on the next major release of Spanning Sync (v1.2, now in beta) which is highly optimized and will enable us to further accelerate our growth. To everyone who's supported Spanning Sync through our private and public betas and commercial release, thank you.