We are currently upgrading the registration system. Hence, those who request for invitation and qualified for a blog on BlogrunN (well, almost all requested were qualified), might not receive any invitation within this 3-4 days.
In the future, when registering for a blog, an invitee (OMG, the word is so 15th-century) will be able to design his/her own WP-Content directory which must consist of a theme folder and a plugin folder with all the themes and plugins he/she wants to use for the blog. Of course we reserve the right to review/edit/delete the themes or plugins that do not fit in BlogrunN environment.
Check out the support site to learn how to design WP-Content directory.