I'm confident that these six new Pinboard/Ptacek/A16Z companies will have excellent return on investment.
Humor aside, there are many smart founders but being brilliant and being money-minded are orthogonal.
Assuming that the recipient can keep a straight face?
EDIT: Perhaps having a16z as the only VC in your seed is a very bad idea. Chris Dixon (now a partner at a16z) cautions enterpreneurs against the risks of having a sole VC in your seed round:
http://cdixon.org/2012/04/02/revisited-big-vcs-investing-in-...
"I can think of about 15 founders I’ve spoken to recently who tried or are trying to raise Series As but are seriously hampered by the fact that a big VC invested in the seed round but isn’t participating in the Series A."
A large micro-investment portfolio.
Anything in this portfolio is sort of a tip of the hat from a16z, a micro-endorsement that messages: "we've got our eyes on this company."
Heck, I will wager $37 that submitting your startup idea to HN will get you more exposure than posting on Pinboard's blog.
I don't have startup credentials. My last startup was 10 years ago; I built a hosting company and sold it to a consulting firm for a couple hundred grand. I'm still in IT, so I clearly haven't made enough to cash out yet (I'm an IT operations lead; paid well, but definitely not F-you money).
I'll offer something better though; come to me with an idea I believe in, something that is going to change the world for the better. I'll provide free room and board for six months while you build it (my wife and I aren't great cooks, but practice makes perfect). If you get huge, awesome. I don't want any equity, I just want you to succeed. If it doesn't work out, head on over to a code school in SF that guarantees you a high five figure salary after your time with them.
I can't offer credentials; I can offer to give what I can to help someone reach their goals/dreams. The startup scene needs an airbnb.com for founders who don't need cash, just time and a place to live, and for people who are willing to host said founders at no (or very little) cost to help with their goals.
startupbnb.com?
This much money, I mean... what would I do with it. I think I can build a sustainable business but I fear at this point that the sums involved are forcing me to give up too much control and to grow faster than will be sustainable. I have legitimate concerns that this will ultimately be bad for the company and that it's helping to fuel a salary bubble.
The going colo article a few months back is invaluable on it's own: http://blog.pinboard.in/2012/06/going_colo/
That $50 would be converted into stock at the time of their next fundraising. Uncapped means there is no cap on the valuation at the time of the next round. So if one of the founders raised money at a $100,000 valuation later, the $50 investor would get 50/100,000th of the shares.
If it were capped, say at a $50k valuation - the investor would get 50/50,000th of the shares, regardless of the valuation.
A convertible note does not buy equity - thats what 'convertible' means - and 'note' means 'loan'. So it's a loan that can convert to equity based on certain conditions.
As I said, all of this is overly simplistic. It's just a 30,000 foot overview.