I believe there are two major forms of comedy that have been primarily developed by the internet; obviously these existed before, but they have been honed and perfected and seen their hayday in recent years. One is the sardonic / snarky condescension comedy, done so well by Surly Gourmand , but this also goes back to stuff like "Old Man Murray" ; basically in this form you humorously point out how retarded everyone else is. The other major internet comedy form is the "meme" ; this comedy form primarily lives on web forums, 4chan and /b/ being the primary nexus, but most major forums create their own memes. In this form you create a neologism or repurpose a word into a reference, and then it is used repeatedly in humorous ways. The meme is really only super funny if you know the history of where it came from.
Bike Snob combines the snark and the meme to optimum effect. The really amazing thing is that he also pulls off the snark without bile, and he creates all his own memes rather than just stealing them from the net. When you first read Bike Snob you don't really get it, but after following for a few weeks, you see the creation of memes, then the development of their humor value, and then they become funny just any time he drops them.
Quantum Diaries Survivor is a pretty damn good physics blog.
I can never get enough of Denny regrade photos
Name Your Porsche - in case you thought your Porsche wasn't douchey enough already, you can name it "Bruce". "Bruce" !!
McLaren Automotive officially launches itself and MP4-12C supercar - yeah this thing is pretty fucking hot. The funny thing is that for the masses of technology they put into these super high end cars, they get microscopic returns. It's technology porn really, it's technology for its own sake, to drool over, not to do anything. If you look at the C&D Lightning Lap results for example, the WRX and the Speed 3 are great values at about $25k for a 3:15 lap, and the closer you get to the top the more ridiculous your cost per second gets. Obviously you're paying for looks and feel and so on, the focus on power and speed is all wrong.
fastestlaps.com View topic - airdrag... factory claims vs car magazine tested numbers.. really sweet page of photos and results from the german magazine "Sport Auto". (note that the photos are fakes though still very interesting - the actual runs for Cd are done with much higher air speed and with the wings up, the photos are taken at low speed air flow where you get those nice laminar lines; the real high speed flows have a lot of turbulence wakes; if more photos like this exist, let me know). The key number is not "Cd" , the coefficient of drag, but rather "CdA" , and of course downforce is very important too. The GT3 has very impressive aerodynamics.
Compact Crank Overload - all about the "compact double". I highly recommend compact doubles for all bikes. Sadly my Litespeed is on a 130 BCD crank and I don't want to have to replace the whole crank so I'm fucked.
All About Motor Oil - in case the last one I posted wasn't enough
Aldo's Pic of the Day - classic cycling photos.