Thanks for your help mobiledivide. Although I went to the website for the GPE Calendar and got the impression that it is a hack of an old Palm app, I'll try it out.

And you're right about what I should do if I want more commercial software. But I do love the N810. It's just that when I bought it I had expected more support in the near-future from commercial-level 3rd party developers. But it seems that numbers outweigh superiority - and they ran to support iPhone/iPod Touch which really makes sense if one is "commercial".