To look at it another way that equates to $1,350,000-1,710,000 in revenue (1,800*$750-950). Not bad for a three person team that is about a year old. This number is especially encouraging when viewed in light of the industry leaders in 3D printing.
The industry leader Stratasys uses a FDM technology similar to MakerBot. The first part I ever printed was on a Stratasys and the quality was approximately what you would get with a MakerBot today. Total revenue in 2008: $124,500,000
The other public 3D printer company 3D Systems reported revenue of $138,940,000 in 2008.
Both companies had a brutal 2009 with 30%+ drops in revenue. After 9 months of data it looks like both companies would finish the year at ~$100MM each. So with almost no R&D budget 3 guys in a basement in Brooklyn were able to generate 2% of what the major 3D printing companies could with 8 figures worth of R&D and a fleet of sales reps.
The most exciting number I could find re: the MakerBot was – 130,329, the number of schools in the US. MakerBot will have a tough time making inroads with businesses, but they are in a unique position to own the educational segment of the market. Hopefully they take advantage before someone else realizes that their plans are open source.