How can you set a default calendar to use for new events on a LG Android 2.2.1 phone?
As no one is answering this question, I presume it is not possible.

So I looked for another solution and found the Business Calender Free edition. This program not only displays a very nice monthly calender, but , most important, let you choose which colour you want to use for each agenda you want to display.

Very impressive indeed.

Just thought I'd let you know ...