While there are countless messageboards where some UCLA fans congregate, there is no online community of Bruins that stretches as far and wide as UCLA twitter.
Unlike most fan-bases, though, UCLA twitter is integrated and tight-knit. Much like basketball twitter is a community where everyone knows the next person, UCLA twitter is a group of die-hards that talk about UCLA constantly and are welcoming to any new members.
Without further ado, here are as many UCLA twitter members off the top of my head; consider this a perennial #FF (or "Follow Friday" as the Twitterverse calls it).
@CalebBenenoch79 (a player but well integrated into UCLA twitter than most)
Media Members – Although not really a huge part of the UCLA twitter family (for objectivity's sake), these media members interact with UCLA fans regularly and are a good follow on el Twitter.