> In doubt, go to 2K resistors.
I find handwaving recommendations like this rather pervasive and annoying, especially in a professional setting.
If you're serious about I2C after gratifying yourself with this bootcamp-style smashbang intro, I highly recommend reading the actual spec[1] (which is more like a casual app note IMHO); the blog apparently doesn't link to it. It's free, relatively short, and oh by the way, there's an entire section which properly addresses pull-up resistor sizing and then some. You'll also be able to spot inaccuracies like:
> It has transfer rates up to 400Kbps