This site allows you to upload MTG tournament data from exported WER files. Players can then log in with their DCI-number and easily find their pairings online.
I've been wishing for an easy (for both players and organizers) way to handle pairings over the web for a long time. These days most people have a smart phone, yet we still have to get crushed in the rush to the pairings board every round. Eventually I realized that I might as well create it myself, and here we are!
I hope you find it useful!