Report via twitter, the CEO of Overstock.com Patrick Byrne stated that in the first day bitcoin sales were worth $130,000

Using the statistic from Wikipedia, Overstock.com Inc.’s average revenue is $1.1 Billion (USD)

With simple math, ($1,100,000,000 / 365 = $3 Million a day) this would make bitcoin represent a 4.33% increase in revenue for Overstock.