What are we calling "passive" these days? Is there a notion about the amount of (ongoing) sweat equity/maintnence to payout we all have in mind? The original notion seems unlikely ==> finish initial work/build and then just sit back and collect checks. Seems like few of the projects posted so far, if any, meet that high bar. Realistically there is almost always ongoing maintenance, and if it comes from a passion, probably also constant tinkering and improvement. I've definitely got one of those -- I can't let it sit long enough to ever call it fully passive :)