I too share your passion for the AeroPress, and might I add, that using the upside down brewing method[1] it makes excellent americano. Best I've ever had actually.
Coffee is not supposed to be bitter, and it's a shame that so many people think "Oh, well, that's just the way coffee tastes I guess.".
I recently got my parents one, and they went "Ohh, it can taste like that? That's really good!"
It reminds me of a similar service many years old, which eventually got shut down by the authorities because some very bad people was using he's service.
I can't remember the name of the guy or the service, but you should be careful such a service.
Don't know if the latter was launched as a viral campaign, but my point is that you know it and the brand it was from if I'd phone you up and shout "WASSUP".
Edit: 25 people from HN now have a keybase account.
Should anyone care, you can use:
To produce a list of your active invites from the invite page.