Can I survive without shampoo?

I found this article ages ago and it tweaked my curiosity.

Traditionally I've washed my hair everyday. Too oily, yuck.
Then, sometime last year, I shifted to every 2nd day and my hair seemed to cope with that ok.
Then I changed to 'natural' shampoos on the (persistent) recommendation of my hairdressers. Apparently, supermarket bought shampoos leave a 'film' that 'weighs down' your hair and is essentially 'evil'.

So I started on on expensive 'natural' shampoo and started to get a little acne on my temples and back. oh yey. Seems to happen every time I go to natural products.
Then I changed to a shampoo for oily hair based on , again, hairdresser recommendation.
[Tangent: this is the ONLY shampoo for oily hair I could find. It used to be that there would be an equal amount of shampoos for 'dry', 'normal', 'oily' and 'normal to oily' hair types. Not so these days. Apparently we've all evolved into normal and dry hair types. I suppose they'll blame air conditioning.]

However, I am now at day 16 of my own 'no shampoo' experiment. I have long, fine, dense hair and I haven't shampooed it since Dec 20. Every day I use a fine toothed comb in the shower to wash out dirt and 'encourage' the oil throughout the length of the hair.

Around day 9 we went swimming in the bay - very salty and I had that classic bay-water hair for a few days. Read: salty and not smooth.

Day 11 saw 'stuff' in my comb. I'm not sure if this was fall out from the salt-water swim, as its diminishing now, but it feels like oil/sweat. I'm trying not to get grossed out.

I've carefully scheduled this for my summer holidays, but its so hot I'm not blow drying my hair for anyone. Consequently, I put my hair up to mask the oiliness and it never really dries in the midddle. Also, I'm expecting to be seen by important-people-who-are-still-forming-opinions/impressions-about-me around Monday week, so I need a result/decision soon.

Will my hair turn out like this lucky Briton's?
Well, even when I get sick of this, or it actually balances out (which I'm betting it won't because its only the 'dry haired' people who benefited from the experiment of the article) there are many more fun and interesting ways to avoid shampoo, but none of them describe going more than one day without washing, which cancels out my first objective which was: to have less work. Hmph.