Simplicity is the key. Tags and labels may make it heavy and overwhelming. Syncing with Google Calendar sounds promising, but I like the idea of exporting to .ics so that it would cover more applications. (though I do love GoogleCal)
I've also considered the different colors idea, and this might be implemented if I decide to build something like a comparator of schedules.
I completely agree with the syncing comment. I think supporting CalDav would be the right(hard) step. I would also like the ability to export a text file of all the data.
Besides the legal side of things, the code might be being built with an company internal tool-chain, and comercial compilers, so it would be a bunch of work to even get it ready for a public release. All of this reinventing of the wheel probably limits nice fixes for common bugs over the years.
Compiler issues shouldn't hold you back. Release it anyway. If someone is interested enough, they will more than likely be willing to work with what they can get. Let the burden of correcting the code fall on them.
While that sounds good in theory, when customers are involved, you want to make sure that you have your best foot forward. So filling up forums with complaints is never a good thing.
I think because Yahoo did not keep updating delicious that these other serves took hold of each of the niches out of delicious. While each of the other services that you mention has their own strengths, I miss having the ability to tag something with multiple tags to better sort things into different categories.
Wow this is pretty awesome. The photo perusing is quite fun with this UI.
In your Privacy Policy, you state that "We[you] only collect user analytics data. " For being more open with data, could you create some page within your application to report what bits of data you are storing about me?
I am using Google analytics to measure trafic as well as events. On the backend I store the email address the user used to create their account, their Facebook ID, favorite friend ID's, and hidden friend ID's. I wanted to be as private with data as possible. 95% of the code runs client side and never talks to the server.
I plan on updating both the privacy policy and the terms of service. I modeled them off of Digg's but I am no lawyer, I am a hacker :).
Great Job! I also wanted to let you know that your website, seems slightly broken in chrome: http://imgur.com/liF73.png
I am not sure if it is due to being in chrome-dev, but it took me a second to understand that the actual content was down the page. After widening up the browser the main content div popped into the right place.
* Syncing with google calendar
* being able to add tags, and/or labels.
* different colors.
However I do like the simplicity of it all.