Vitzo offers custom Drupal theme development and template modification services. We pride ourselves in creating stylish, modern and professional designs that look great in every major browser. W3C standard compliancy for XHTML and CSS are high on our list of priorities.
This website itself is an example of a very clean and professional looking "Web 2.0-style" theme for Drupal 6 and upward. You can use this template for your own site as long as you don't remove the accreditations. It's availabe for download right here (do not download from Drupal Theme Projects since this archive contains only dummy files due to licensing issues). This theme is highly flexible; it's the same exact theme with a slightly different configuration as that of oondi.com (screenshot below).
Professional and enterprise users can opt to get a license which allows removal of the links for a yearly fee of 45 EUR. It's not a one-time fee because we continually improve the theme and will continue to support future releases of Drupal. Buy a license to remove attribution links or contact us for more information.