Microsoft chairman Bill Gates said that a “mini bubble” has emerged among Internet companies, but that it probably won’t reach the level of the previous dot-com boom. “We are back in a mini-bubble era in terms of people expecting a lot of these valuations, but I don’t think we’ll see the same amount of exits the way we did,” Gates said last Friday at the software giant’s fifth annual online advertising conference. He added that companies such as Amazon, eBay and Yahoo are here to stay, “but over time the boundaries of what those businesses do will get fuzzier,” according to CNET