I did not type Freshly Pressed in my comments above. I was not referring to Freshly Pressed. Slik had already posted the link for Five ways to be featured in Freshly Pressed so I just added other ways that blogs were featured.
I copied and pasted from the BOTD page:
Top Blogs (The most popular WordPress.com blogs are ranked here according to a special formula.)
Top Posts (The most popular WordPress.com posts are ranked here according to a special formula.)
Growing Blogs (These WordPress.com blogs gained the most popularity recently.) http://botd.wordpress.com/growing-blogs/
This is what I was pointing to in regard to Page Views received within a certain timeframe ->
How BOTD works
We count up the visitors to all public blogs and posts in a rolling 24-hour period. No personally identifiable information is stored. Several times throughout the day, we summarize all of this data in different ways to produce lists of blogs and posts that might be interesting.
BOTD does not use numbers shown on the Blog Stats page of your Dashboard. Some page views are excluded for various reasons. We use proprietary formulae to calculate the popularity of a site. http://botd.wordpress.com/about/