Mwebvendor mans_bx They have no widget for random blog but they have xtblog twig.

Check this articles http://forum.xtgem.com/index/__xt/post-oqp0yi6mk4estv1g33ba4fqp0yi6mk4estv1g3.html

But if use this twig, you have no pagination on your bloglist, the only one is the link to refresh the the bloglist.