With some coding, you can create your own permanent sideblocks by creating classes in vault/core/model/block and vault/core/view/factory/block and by adding an appropriate entry to the database in the vw_block table.
If you aren't feeling that adventurous, you can create a sidebar block using BB-Code.
Code:
[div] position="sidebar" |
BB-Code content
[/div]
You would have to put this BB-Code on every page where you want your nav-block, so you should probably create a wiki template and include that on your pages. It will make it easier to manage.
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