Tumblr in the Hay

You know, I'm not ashamed to admit that I sport some nerd lumber whenever Marissa Mayer is in the news, but uh, whose bright idea was it to dump a bil plus on a micropornblogging venture with no real revenue model? Not that Tumblr can't or won't eventually turn a buck, as it continues to build, but right now, Google seems to be holding most of the cards in the tech biz, what with Dell circling the drain and Microsoft devolving into a shameless licensing racket.

Let's face it -- this weekend's real lottery winner wasn't the lucky bastard hiding out in America's Wang, it's David Karp.

Internet Business Questions

Couple questions for any of you kids out there who may have an interest or experience in these things:  the site I'm working on is going to be about guitar and guitar technique, theory, that sort of thing. Lot of "shred"-type stuff, but not exclusively; in fact it will probably cover more technique and theory.
So basically what I'm wondering is if any of you folks have any particular knowledge or experience to share in building and promoting an internet business of any sort, or in writing and promoting e-books (site-based PDF, Amazon, Smashwords, etc.). I've spent a great deal of time over the past year, familiarizing myself with the usual internet marketing ideas, Warrior Forum, etc., and found that while there are definitely some things in that area to try, I'm more interested in a content-based business model than in relentlessly marketing, trying to cast an insanely wide net on a fairly modest niche. But I'm interested in any experiences any of you may have had in those areas as well, good, bad, or indifferent.
Again, any observations or thoughts, however large or small, are most welcome. If you'd rather not post in the comments thread, feel free to drop me a line at heywoodj.dan@gmail.com, I actually do check it pretty frequently these days. Thanks.