> Also, what is Jeff Atwood's and Joel Spolsky's net worth now?

This is a fun game.

Some assumptions: both founders own equally. Early funding rounds take 20%, late funding rounds take 10%, all rounds make a new option pool (I used 15% to account for the Option Pool Shuffle). There were 5 rounds AFAICT.

So each founder would get:

    $1.8B 
    * 0.5 # initial 
    * 0.8 * 0.85 # series A
    * 0.8 * 0.85 # Series B
    * 0.9 * 0.85 # Series C
    * 0.9 * 0.85 # Series D
    * 0.9 * 0.85 # Series E
    = $186M

The numbers usually skew worse than this ideal version,, and it also depends how much of the deal was cash for ownership, vs incentives to keep the existing team (which is often included in the headline number but doesn't cash out owners). So I'd round down to maybe $100M. (They might also have had a few sweetheart rounds, so it could also go better).

Joel also has his sale of Trello (probably >$120M), and his ownership of Glitch (formerly Fogcreek - private) and Hash (private).