At least in the
public relations industry, you'd be surprised in how prevalent
snail mail remains. Most
reporters still prefer to receive
press releases via snail mail. The reason being that it's extremely annoying to them to be besieged by
unsolicited press releases via e-mail. Even more annoying to the media is to have their fax machine flooded, as this often blocks important faxes from coming through.
In fact, a while back, the Orlando Sentinel threatened to fine public relations firms for sending long unsoliticed press releases via fax (I believe the fine was $2 per page; not positive).
With the rise of e-mail, many people think trying to send information electronically is the way to go, and for immediate urgent releases it might be. However, for less timely information, a well-constructed press kit, mailed first class is still often the way to go.