b2evolution blogs are installed with a default selection of Widgets. For example, the sidebar of this blog includes widgets like a calendar, a search field, a list of categories, a list of XML feeds, etc.
You can add, remove and reorder widgets from the Blog Settings tab in the admin interface.
Note: to be displayed widgets are placed in containers. Each container appears in a specific place on a skin. If you change the skin of your blog, the new skin may not use the same containers as the previous one. Make sure you place your widgets in containers that exist in the specific skin you are using.
b2evolution uses old-style permalinks and feedback links by default. This is to ensure maximum compatibility with various webserver configurations.
Nethertheless, once you feel comfortable with b2evolution, you should try activating clean permalinks in the Global Settings > Link options in the admin interface.