I had the header at 9.30 this morning. I just refreshed the page and my number has gone, so either they've fixed it or I'm using a different proxy that doesn't have the issue.
Just been looking into this and from the little info I can find, it looks like your phone number would be classed as personal information and so covered by the data protection act.
I'm part of a startup that is all written in ASP.Net MVC and we all really like it. The costs of the licenses were our only initial concern about using it, as they are a bit prohibitive, but it can always be hosted on something like Azure. All our back end systems are written in C# as well. For us, things like the excellent debugging features in VS.Net and the fact that there was a lot more experience with Windows and SQL Server in our team, we decided to keep to our strengths, so as to get going as quickly as possible.
Both sites (http://seoshop.biz/ and http://plussem.com/) use Google Analytics. So Google could feasibly track who makes a purchase. If you make purchase on those sites and you've recently logged into your Google Webmaster tools or something and then get a load of +1's Google could surely fairly easily see that.
Doesn't seem like front page news. Use key based auth and disable root login. You can also get an ssh client on your iphone if you don't mind keeping your private keys on it, just make sure to use a long password and be prepared to change all your server keys if you lose your phone. I also ban every IP that even tries to login as root.