Change "Blogs" to "Sites" and hide "Private" sites.

Hi,

Is there a way to do the following:

1. Change the Blogs Directory to use /sites/ instead of /blogs/ in the URL? In addition, is there a way to have the listing use "Sites" instead of "Blogs"? Since WordPress is going more to the Sites model, this would be helpful. Our latest WordPress multi-site install is focused more on Sites and is being used by Faculty who would prefer the term "Sites".

2. Is there a way to hide Sites that are listed as Private? In other words, the sites that have the Privacy option set to "Block Search Engines". We are currently using a more rudimentary list for sites, but it does offer this feature. When we create new sites, we prefer to hide them until they are ready to be shared more widely.

Thanks,

Sylvia