Thesis Theme version 1.5 is currently in beta form and has been actively tested by the Thesis Theme Community for many months now.
Due to be released any day now, when it does it will be thoroughly tested by real users and provide the best level of 
functionality and reliability Thesis has ever offered.
To find out when the full version of Thesis Theme 1.5 is released, follow @diythemes and/or @pearsonified on Twitter like I do.
All the new WP features like threaded comments and paginated posts are now available with Thesis 1.5. Other features and enhancements include:
- User specified widths – Make your column widths and sidebars any size you want. You can even swap your sidebars around in a click. Specify the widths of all 3 columns simply in the Thesis Design Options section of your dashboard.
- Wordpress 2.7 comments functionality - now Thesis supports everything that WordPress 2.7 supports including nested comments and comment threading, pagination, etc.
- Style sheet simplification - After you specify your choices based on your desired widths and options of how your Thesis site will look, the save button generates a single file (layout.css). Surfing your site will be faster than ever. No longer will your visitors have to wait for your site to cycle [although it is very quick] through multiple style sheets. They will no longer see a shadow of the default Thesis Theme if you have a very long and complicated style sheet. Less to download, easier on your server, their server and their surfing experience.
- International language functionality - Thesis now supports multiple languages.
- Multimedia Box for single column blogs - prior to this release you lost the multimedia box when you switched to a single column site. IF you think a single column can’t look great and do wonders for your site’s traffic, check out Kristarella.com – this is a fantastic Thesis Theme site using the single column.
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Can you tell me who did your layout? I’ve been looking for one kind of like yours. Thank you.
I did my own layout. You just choose your column set up in the dashboard area, load a background and header image and change the colours of your titles and fonts. If you have something specific in mind you copy and paste what you like from the Thesis Forum or read some tutorials from around the Thesis Theme community.
Can you help me with the Nested comments thing in Thesis ?
You check them on or off in the WordPress dashboard settings, ‘discussion’ and choose how many levels you would like. 5 is usually heaps so your formatting doesn’t get too busy.