Link: www.standingcommitment.com
This is an interesting website, which logs how many pushups you're doing each day. My co-worker and his brother are nerdy-math types, which is apparent, once you see the site. Anyway, to participate, you need to email the webmaster with your totals, so the data entry is low-tech, but still highly-effective--then again, so are pushups.
Improve you upper body strength!!
Email me for the webmaster email address. I want to help increase participants, so they have to make it a line chart, rather than a bar chart...