EMC floated 10% of VMware today as an IPO (NYSE:VMW) and wow, is it taking off. Starting at $29, it’s at $51 after a couple of hours of trading, making EMC’s $635 million investment in 2003 worth $19 billion today. If this price is maintained (which I doubt it will be), VMware would be half as valuable as EMC itself, according to the market. It also has a market cap higher than some other enterprise names you might have heard of: Network Appliance, Sun, Seagate, Symantec, CA…