Take a look at this video I just put together talking about the LinkedIn IPO (currently valued at $10 Billion) and what it means for you:

As you are considering your own marketing mix, particularly if you are a small or medium sized business I would think you’d be hard pressed not to acknowledge the potential ROI that LinkedIn can deliver on, particularly as with their huge treasure trove of cash they are likely going to be doing a ton of very interesting things, many of which when translated to you mean an even great return on your efforts with the LinkedIn.

Also worth a quick read is this post I wrote as LinkedIn announced they crossed 100 million users.