Cool new web 2.0 logo

I'd like the logo to have a new, fresh clean look for this new activity-minded microblogging site. Looking for a clean-looking logo (something like newsgator.com)

iSweat

The company can be described as "twitter for fitness". It focuses on the idea of allowing people to motivate each other to participate in some type of physical activity everyday.

It should have a cool, web2.0-type feel but also have a clean, simple look.

- I'd like to see a tagline "break one sweat a day"
- open to all color schemes
- I tend to favor a clean, fresh look (similar to the logo from this site 99designs.com or newsgator.com)
- I'd like to see variations with the "i". Some as a lowercase like iSweat

- Don't want really dark colors like all black or dark purples, etc.
- Don't want all CAPS.
- Do NOT want a fitness image or clipart (i.e. someone lifting weights. this site is for all types of activity, not just strength training)
- Do NOT want actual sweat dripping or water images