I’ve been really enjoying Head First Algebra by O’Reilly.

Now I need them to publish a Head First Guide to Calculus and I’ll be all set

Did you read the update and click the “over *here*” link? There’s quite a bit more detail there including the answer to the question.

Exactly as you said, part of what motivates me to use it is the fact that, while I’m getting updates from my friends about what they’re eating for lunch today, I’m also getting updates from some truly hardcore geeks around the world about whatever’s on their mind at the moment, and that’s priceless.

Part of what motivated me to write this article is that Facebook has explicit provisions for turning *off* all the game spam, and selectively filtering out what you have zero interest in.

While hash tags in Twitter do kinda sorta not really the same thing, they’re far less efficient and all encompassing, and I find it annoying to essentially force people to use clients that have filtering just to hide what I see as nothing but noise.

So by all means, have fun throwing snowballs, planting little green thingamabobs, and sending drinks to your friends, just do it on Facebook where I can patently ignore it if I want

I’ve been playing around with Plurk (http://www.plurk.com) a bit lately, and it’s fun, but not many people use it (and I haven’t found any publicly well-known folks there as yet to follow- they’re all using Twitter).