Here is another thread about viewing locations and my warnings about the confetti.
http://www.costaricaticas.com/phpBB2/viewtopic.php?p=50844. The place I watched it last year was in front of the Gran Hotel. You have to get there early to get a good spot or be prepared to worm your way through the crowds and even then you probably won't be able to see much over the heads of other people. Having some sort of chair or footstool to stand on might be helpful. Be sure to leave any watches or wallets at home as this will be a pickpockets paradise. Hold on very tight to your camera if you decide to bring one. Personally, not being a crowd person and having seen it before I will NEVER bother to watch it from the street again.
You see people on the upper floors of the various banks on Ave. 2 looking down on the parade and that is definitely the way to do it if you can get an invite. I had suggested getting a hotel room with a view and throwing a Fiesta de Luz party, However I am not sure of the entire parade route. Where does it start? I know it goes by the Royal Dutch but that hotel is not chica-friendly. I think it starts on Paseo Colon but I'm not sure where. I had suggested the Ambassador Hotel as a possible party location. Can anyone confirm whether the parade goes by there? If so is it too late to reserve a room with a street view for that night? Perhaps a group of CRT'ers migh be interested in splitting the cost and throwing a party for a few guys and their chicas. I think that could be a really great idea if it is workable.