I love, love, love Headway Themes. I'm absolutely in the not-designer camp so it's quasi-anathema to me having all these powerful style tools at my disposal - that are uber-easy to use.

Stellar support and a great guy in Grant Griffiths helping steer Headway into #1 position for WordPress themes - I think it's fair to say this is one blog accessory that we all need to aspire to.