Starting with a Twitter exchange back in September between those company's officials, then swerving around Yahoo's pass at aggregating, then VatorNews' recent "scoop" of a $2.5 billion merge with Google ... well, it's damned interesting.
The most recent "sources say" sort of story is from Kara Swisher, scribe of All Things D: "According to sources close to the situation, Google has offered $5.3 billion for Groupon, in what would be its largest acquisition yet, if completed."
If Google adds this consumer-habit-data arrow to its quiver, and then pairs it with the travel-plan software, ITA, well that's huge enough.
Of course, relatively new Facebook Deals is in this social couponing space as well, which might cap Google's return on the $6B investment. But, Swisher points out, Groupon is generating about $50 million in monthly revenue.
Before you know it, that adds up to some real money.