Read most of this and just like to say, I'm in a guild,made friends and still find it hard to put flashpoints together due to different levelling paces between guildmates/friends, so those solutions don't always work.
I really want to do all the flashpoint as i level up but as it stands now i waste a lot of time trying to get a team together to no avail, time i could spend enjoying my class story, so please bioware add a dungeon finder system.