There are three FC host card vendors
Brocade also makes Fibre Channel host bus adapter cards.
It would make more sense for EMC to buy Emulex, which only makes FC HBAs and embedded FC switches for storage arrays. QLogic also makes FC switches which target the small and medium enterprises, as well as HPC focused InfiniBand switches.
I would not be surprised for Juniper to look at QLogic. IBM might be a player, since QLogic makes FC blade switches for IBM. Another potential would be for QLogic to acquire another company, especially one with Ethernet expertise. Blade Network Technologies and QLogic have similar business models.