I don't know why Skype being able to see the URLs is such a huge issue that people are saying they won't use it for business purposes, but at the same time we see people and companies use Google Docs, Google Apps, Gmail which allow Google to see all your business documents, spreadsheets and email.
Is this because they think Google is somehow more trustworthy that Microsoft? I am not saying Outlook.com/Skydrive is more secure, but didn't a Google employee get caught reading Gmail information to stalk teens? Atleast Office is primarily used for storing files under your own control, unlike Google docs where you have no choice but to risk Google employees reading them.
People were saying for years that the superior UNIX design and the bad Windows code is the reason that Windows had a huge malware problem but Linux and Mac did not.