So everyone finally agrees on what many have been saying for the past two years: eBay ( EBAY) paid too much for Skype. eBay's capitulation on that point -- underscored by a write-off equal to more than half what the deal cost in September 2005 -- has ended that debate. But some key questions remain. A few of them are best addressed in the case studies that will be rolling out for months to come: how to ensure that the disruptive new business you're buying can be monetized; the dangers of overpaying for a flavor-of-the-month start-up; integrating a company with a different culture into yours without spurring an exodus; the myth of "synergistic" acquisitions, etc. Such academic pursuits will keep business school students weighed down with reading for years to come. But for the purposes of the stock market, there are four more immediate questions facing eBay -- and the Internet sector in general: Can eBay's stock rise even further now that the Skype cloud is starting to clear? The write-off is a bitter pill for eBay to swallow, but at least it will go down fast. The company is taking a $1.43 billion charge related to the Skype purchase, but those charges are like Wall Street's version of a confession booth. Once you come clean, your sins are absolved and you can get on with your life. The idea that eBay had overpaid for Skype was one that seemed to color every single earnings call since the acquisition was announced, a dark tint that spilled over to its marketplace and PayPal business.