Electronic submission of candidate materials can vastly simplify the process by which candidates apply, and by which search committees respond to them, but it has risks. Candidates who would otherwise have to struggle to pack, weigh, stamp, and get their materials to the post office or express-mail service now can submit them with a few clicks. However, there are risks in this approach. Your letterhead may not be able to be transmitted. Attachments may be difficult for some recipients to open.
Viruses can delay or disrupt transmission.
But on balance, electronic submission is a boon, and more searches are encouraging it. The internal work of the search committee can be improved and made much easier. Search committees that can establish an electronic mailing list or other form of discussion group can help their members communicate with each other much more easily between meetings. If committees are comfortable with security issues, candidate files may be circulated electronically. Most committees that I have worked with, however, are not comfortable with this, since maintaining the confidentiality of their candidates is a very high priority.