brownday

As long as it's original content, I don't see a reason why it would hurt your product.

An example of a product that has great personality that I personally love using is WuFoo

http://dontfeartheinternet.com - these are videos on the basics of HTML and CSS.

Good luck!

Interesting.. does Facebook provide the same linkjuice that Twitter seems to be providing?

Hyperlinking text and being able to read your subscriptions in an RSS-like reader fashion would make this the perfect mobile Posterous app!