Akon is a two column, simplistic, minimalist, light colored theme for WordPress with a very nice header image. Preview here. ZedSimple is a simple one column layout. Preview FlyAway is a 2-column wordpress 2.0 theme with Custom Header support with the header wallpaper by KoL. Preview Small Potato has released three more themes viz. Quadruple Blue, Zip It and Fruitlicious

Fast Track has been updated to support WordPress 2.1 Braille is a two column theme for WordPress and WordPress MU, which also includes a Print stylesheet. Cordobo Green Park has been updated to work with WordPress 2.0 and 2.1. It is a three column, widget ready theme for WordPress with the original template coming from chungo.net

In her article Fear Not WordPress 2.1 and WordPress Plugins, Lorelle tries to address the fear / paranoia while upgrading to WordPress 2.1

Alex King has updated Share This and WP-Grins. These are available on his WordPress Plugins page. Wikipedia-NoFollow will add a a rel=”nofollow” to all your outgoing links to Wikipedia. This is in retaliation to Wikipedia adding a rel=”nofollow” to outgoing links. WordPress 2.1 requires smiley codes to be followed by a whitespace character. Usmivki allows displaying smilies that are followed by non whitespace character. iMax Width sets a maximum image width so large inline images don’t mess up your wordpress theme. It also adds height and width tags to all posts so the page loads more smoothly. Simple Clan War permits you to add your clanwar results on your blog using a simple tag.

WordPress 2.1 Gotchas lets you know some of the problems you might face on upgrading to WordPress 2.1.

Maria Langer guides you to a few steps you should follow before taking the plunge into WordPress 2.1 in her article Upgrading WordPress to 2.1: Dealing with Plugin Compatibility

Show/Hide Links has been updated to support v2.1. This plugin generates a list of all links, listed by category, and outputs it as a series of unordered lists with Javascript-based Show/Hide functionality. Also adds a class of “offsite” to each link to cause them to open in a new window. WP Unformatted has been updated as well to support WordPress 2.1. This allows you to add custom fields to a post to disable auto-formatting and/or auto-smart-quote conversion on a per-post basis.

Fishy is a 2 column, widget-friendly wordpress theme. Island after Sunset is a two column theme which features Aldin McLeod’s island photo from stock.xchng.