With US equities soaring to record highs and many recent IPOs showing healthy gains, it's a good time to look at the next wave of buzz-worthy companies that...

With US equities soaring to record highs and many recent IPOs showing healthy gains, it's a good time to look at the next wave of buzz-worthy companies that may go public. The latest social media sensation likely to get called up is Pinterest. The content sharing site could be the next Twitter (TWTR) in terms of IPO demand and lofty valuations. Like many social media sites, Pinterest's business model is still a question mark. Another potential social media IPO is Snapchat. The video sharing app just turned down a $3 billion buyout offer from Facebook (FB), possibly to take a shot at going public. Some other potential IPOs - mobile payment company Square, digital music service Spotify, and file sharing company Dropbox. It will be interesting to see if the recent string of successful IPOs kickstarts the next wave going public.