Pardon the "new guy" just jumping in here, but I think this is a great idea. A couple thoughts...
Datacron Runs -- I might try to organize this by planet, by level bracket, or just by difficulty. I would also think about linking to the some of the holocron videos on Youtube so that folks can do these (the ones not guarded or in heroic areas) on their own, so that as a group we can focus on the more difficult parts. But, yes, I think this is a GREAT idea.
World Bosses -- Absolutely. Only trick here is the respawn time and the off-chance that someone killed it shortly before we tried to.
Heroics -- Except for higher levels, I'm not sure how well this will work. I don't know about others, but I pass through levels fairly quickly. I'll be on a planet for a couple days, tops, before moving on. Trying to schedule something in advance for a heroic like that... might not work. This might best be tackled in guild chat. Just a thought.
Questing -- Sort of like heroics, this might best be handled through Guild Chat. Perhaps people who are willing to help could put on their members notes "Willing to help with Questing/Heroics"?
Flash Points -- I would love some times set up around this, particularly at the higher levels, whether it's for Hard Mode or just doing those high level flashpoints. I have never been able to do Red Reaper, Battle for Ilum, The False Emperor, etc., because I can't find a group. Occasionally one other person, but not a full group.
Anyway, great ideas.