Last week I found Peperclip themes of BlogEngine.Net. It was adapted by Caio Proiete. But they wasn't totally supporting version 1.4 as well as they had few CSS issues. Beside I wished for more wider area.
Thanks to Caio Proiete for providing these themes. I worked with them and tweaked them to support BlogEngine 1.4 and to provide more wide area for blog posts. You can download first 2 themes now (Cactus and Fall). Hopefully by next week I'll be done with the other2 themes. It worth to mention that I just modified the CSS, MasterPage and CommentView control.
Main CSS modification was around to support Widget Zone including Out of The Box Widgets. Beside fix few incorrect displaying styles
MasterPage modification was basically to provide WidgetZone. I also removed the Navigation section on the left menu and provide it as a widget which you can fine in the same download packages
While CommentView control modified to provide better comment adding form and better comment display with Avatars.
As Caio Proiete mentioned feel free to modify but don't forget to keep his credits.