Om Malik at Gigaom gives a nice evaluation on LinkedIn’s recent $1billion valuation. By his calculations, the site is worth a little more than $1 billion due to the number of users.
People who know me know that I am a huge LinkedIn user (full disclosure: I’m a Premium User with 3.5K in my network) but this valuation is a little bittersweet since I’ve been getting a lot of errors at LI lately. On the messageboards, I’ve been seeing a fair amount of complaining about issues heavy users have been having.

That said, I reconnected with an old acquaintance in Holland. A guy I hadn’t spoken with in nearly 20 years. And it was great to reconnect. And, compared to other social networking sites, LinkedIn is by far the most professional and easiest to use.
So, yeah, bittersweet.