It varies a TON, I mean a TON. Passively (have done no work in 72 hours or so) I make usually around $150-$175 a day, that takes into account days though that I do $400 and others where I do just a tiny bit; perhaps no products sales and just a few dollars from CPA offers and a bad day on AdSense - even though I've done nothing different and haven't worked in a while.
However when I work for a couple of days straight I commonly do $800-$900 that first day and then a $2K-$2.5K second day and then a $1K-$1.2K third day and then I'm done. I usually work like this 1-3 times a month for 3-4 days at a time. Sometimes I don't work at all for a full month (aside from 'play' working=hanging out on forums, etc. making connections and planning future business/ideas but really not doing anything that will pay me) and still fill my bank account with around $3k-$5k monthly but that's tough as my bills are half of that and I have expensive habits (eating out, vacations, girls and of course I love to get high

).
So ya, it really depends. I want to eventually get to $2K a day in passive sales (on days where I haven't worked in at least 3-4 days) and then just do like 30 minutes of support/e-mails in the mornings and 10-15 minutes at night with a day or two of work a month. Unforunately I'm lazy so I already rarely work but I really need to in order to get to that next level. If I worked everyday for 4-6 hours I'd be in great shape.
Anyways I don't usually disclose figures like that and I can assure you I'm not bragging; the big boys do my yearly income on a product launch they spent 2 weeks on and some even do that in a day marketing affiliate/CPA via PPC. I mostly wrote all of this out to make myself think and focus and dedicate more to work! Thanks for the thought starter
@l0goz - If you don't have a huge PPC budget or other costs I'd say that is surely something to be proud of! If I didn't have my drug habit I could live comfortably on that where I am now right at the beach in FL which is more than most Americans can say these days

BTW your balance at $7K, does that mean you've doubled your average this month or does it include your payment to be sent out in a couple of days from last month as well? Just curious its always great to see stats with a huge period over period increase!