According to this article, Rackspace paid $16.5 million for both Jungle Disk, and Slicehost together.
Since I have little expertise or knowledge about Jungle Disk, I am going to factor it out, and focus exclusively on Slicehost.
The article claims that Slicehost has more than 15,000 active slices. Doing some guesses at the math, let’s say on average each slice pays $43 a month, the cost of a 256MB ($20), 512MB ($38), 1024MB ($70) slice combined, divided by three.
That equals $645,000 per month in reoccurring revenue, or $7.7 million per year in gross revenue for Slicehost alone.
If the above numbers are anywhere close to correct, as I suspect they are, it seems like Rackspace got a killer deal.
