My friend (and ace python/javascript hacker) Tim Stebbing has only just dipped his toes in the water with LinkedIn, and was wondering how many people he’d find in his network when searching on his primary area of expertise.
I figured I’d give it a go too - while I’ve been slowly building my LinkedIn network I haven’t yet made much of an attempt to use it, and I guess the first step in using it is having some understanding of what sort of expertise is available to me.
So, here’s my first query:

That’s not too bad a result, I guess. The next step is probably to go through the list identifying people I might be able to help, as well as people I’d like to be more like.
Searches for less specific terms (such as “linux”, or “php”, “python”, or even “grid”) bring up so many contacts that the list gets capped at 500. Still, assuming those are sorted well for relevance, its useful to know there are a large number of potential contacts with whom I may have some friends or colleagues in common.
