While google may be able to go ahead and re-index websites if it loses that data, "regenerating" gmail and google docs stuff isn't quite so easy, and even small amounts of data loss would kill those applications (especially among paid users).
The article states that the JWST passed the Mission Critical Design Review, which is a specific event, not just a "critical review". This review means that the entire spacecraft has been designed and analyzed. However, there are likely to be further delays as hardware is built and engineers realize it doesn't quite meet the expectations that the analysis set out for it.
http://www.newegg.com/HelpInfo/ReturnPolicy.aspx#29 Newegg will refund open box items, but won't replace them (presumably because they may not have enough stock to replace it)
Most of these files were developed to break mail scanners, so it's logical that they get marked as malware. E-mail may not be the best way to move files that are designed to be harmful to mail servers.