I currently use daychaser as my preferred calendar, and out of curiosity downloaded this app earlier this afternoon.
This has far more functionality and as the previous reviewer has stated, has a very bright future. It's easy to use, intuitive, very classy and easy on the eye. I had loads to say about it, but it's all been covered by mseiks review, even down to the request for sound reminders and a year calendar view.
Although VT shows Preminder as a Beta concept, a quick visit to the preminder website shows that this is donatioware at the moment. I'm going to throw some money at it as soon as I post this.
To Alec the Developer - this is great work - but watch it , Apple might buy this out.
It blows ical out of the water. See for yourself.