Logo for new online membership site

Let's Live to 100 ......and love it. (letsliveto100.com)

I am starting a new membership site all about How to live to 100 and I need a great logo.The site will have input from Natural Health professionals about diet, exercise, general well being and alternative therapies, with a long term view of health.

People who are generally interested in improving their health, losing weight, getting fit and finding out - through natural methods, how to stay healthy and live a long life ....and love it! Not too young and certainly not beauty queens and/or muscle men. I expect women 30-60 will be the majority of subscribers, but I don't want to exclude men

A fresh crisp design incorporating - healthy food, exercise, nature (out-doors), that will appeal to people wanting to be healthy.
No Cartoons - I want it to be crisp and educational
The typeface should be clear, simple and bold. I want something that stands out.
Not cute. - educational and crisp.
I will be using this in a Wordpress theme (to be designed when the logo is decided).
The design will mostly be used online, but will also be used in print.
Please do not use any clip art.