You can donate on my donation page.
PushupCounter.com will eventually be the best way to socially share pushup counts for social purposes.
Planned features include the ability to create/invite different groups of friends, challenge each other and view your group(s) leaderboards.
Until then, I thought I would use the site to share my personal pushup challenge progress.
Follow me on Twitter at @LeeEnglestone to follow my progress.
Disclaimer: Always get medical advice before starting any exercise regime.