A nice looking custom theme for BuddyPress found over at DeviantArt. The original dev made it for a local band, and kindly offered it for download. Swap out the graphics and you have a whole new theme.
Download link is here, as it’s tiny & hard to find on the DA site.
This is another child theme for Buddymatic. Early Morning is a Child Theme by Cristi Antohe. Early Morning needs some minor tweaks for BuddyPress.
To use Early Morning with Buddymatic:
Special design for a buddypress social network with the Ines buddypress Theme.
Enables your very own cooking social network with built in sliders, options panel and fully compatible.
This was a pre-existing theme for WordPress created by Roy Guan at Theme Junkie. I added the needed BuddyPress components so it would work in BuddyPress to build a community on celebrities or fashion.
I did tweak the sidebars a little so the sidebar ad could also be shown on directory pages. The BuddyPress parts are shuffled off of the main page, so at first glance, it still looks like a regular blog. Menu items and the admin bar lead to the BuddyPress areas.
Get the BuddyPress version here: [download#2]
Sophia child theme for Thematic & Buddymatic
This is a child theme created for Thematic. You can use it with Buddymatic by changing
Template: thematic
...
/* Apply a basic layout */
@import url('../thematic/library/layouts/2c-r-fixed.css');
/* Apply basic image styles */
@import url('../thematic/library/styles/images.css');
/* Prepare theme for plugins */
@import url('../thematic/library/styles/plugins.css');
to
Template: buddymatic
...
/* Apply a basic layout */
@import url('../buddymatic/library/layouts/2c-r-fixed.css');
/* Apply basic image styles */
@import url('../buddymatic/library/styles/images.css');
/* Prepare theme for plugins */
@import url('../buddymatic/library/styles/plugins.css');
in style.css in the sophia folder. Download the Sofia child theme over here.
Updated, thanks to Grandin comment below 
A bright theme based on the default BuddyPress theme framework. See it at Michael Kuhlmann’s site and download it from google code repo. BuddyPack
This is a lightly skinned BuddyPress child theme with a cool light blue color scheme. It’s just enough of a difference from the default to be pleasing.
Theme homepage Please visit the original site to download.
