Jolicloud, the custom OS designed and built specifically for netbooks, is quietly launching later this month in private alpha for a select number of early testers and people who put themselves on the waiting list. I had a long chat with founder Tariq Krim (of Netvibes fame) about the current status of Jolicloud and came away pretty impressed. You'll need patience before you can give it a whirl, but the good news is that we got hold of some exclusive screenshots of the operating system in action so you can see how spectacular it (still) looks, at least.First, the skinny about the project. Krim has always been bullish on the (open) Web in general and open source technology in particular, and when netbooks started to make their way into the low-cost computer market right about the time that cloud computing was clearly maturing, he thought it was a shame that the user experience on the small-screen computers was often below par. In an effort to change that, he sought to develop a custom-built OS using open source technology and betting big on open standards, that would basically make using netbooks sexy in the same way that Apple showed the world how a mobile phone should function when it introduced the iPhone.