YoYoSpot

印象中他們的 calendar Plus 好像不錯用....
不知道有沒有支援中文.... should be though...

http://community.bamboosolutions.com/blogs/bambooteamblog/archive/2009/07/16/user-groups-free-to-do-more.aspx

The first step is for you to register your SharePoint User Group.  Once registered, you will be granted $1,500.00 in credit towards your choice of any Bamboo product.  Keep in mind that most Bamboo Web Parts list for less than $1,000.00  You might choose something like the Bamboo IT Productivity Pack or User Manager for Sites to help streamline administration of your group's site.  Or you could choose a combination of powerful Web Parts like Calendar Plus and List Rollup Web Part to enhance your group site and make managing meetings and events easier.