I made some changes to NP_ShowBlogs. The main new feature is an option to define where the page selector is show: on top, on bottom, or on top and on bottom of the page. I did use a blog specific option, so this version now requires Nucleus 2.2 or newer.
Actually this could be implemented easily as an parameter of the skinvar, but I like this as an option better, as with this you don't accidently use some different layout in different templates. I didn't update the wiki yet, but I did post ot the nucleus forum.
[EDIT] Forgot to mention: the changes try to fix some XTHML problem too. Now the & in the URL should be represented as &.
How can I enable navigation only on bottom of the page with you version of NP_ShowBlogs.php?
There should be an option on your blog settings page where to put the page bar.