I just released the first version of Mount Manager. A tool to manage mount points on your android device. Mainly geared towards CIFS, but I will be expanding to other file system types in the future. The application is available for free on the android market. There will be a license in the near future that will remove ads and possibly enable additional features.
You can easily add/edit your cifs mounts and see the amount of space used/free on the share.
Some devices do not come with support for CIFS out of the box, so in order to account for that, the application has the ability to load modules in order to add the file system support.
These modules can be added and removed from the interface as well.