Right, it's the end for the world preview event for me, for I am hitting the bed after writing this. It has been great fun, and I am very likely to get the game when it releases.
Didn't do the last mission, didn't find out about all the bonus quests in the mission, and didn't have the time to explore all those explorable areas. But anyway, a few more things to share:
- The small map on the lower right corner: one can click on it to "ping" and draw on it, very handy.
- Keyboard setup: I changed the logging off to "End" (default is F10), and use F5 to F12 for selecting team mates. I find that handy for following the leader, just F# and space bar. Good for casting benefitial skills on team mates too.
It has been fun playing with RBers who has similar play style in the coop missions, thanks!

Felt really good to have done the Bloodstone Fen mission again in caster heavy team with only one death (at least that's what I remember) in the team, and that's at the very final battle with that big bad boss. We (full RBers team!) didn't have a primary monk, and only one primary warrior IIRC, but we did much better than my previous run in the same mission, when I was with a group with different play style, or maybe it was just headstrong player...
For those still playing, there is this Captain Greywind in Northern Kryta Province, the explorable area of Lion's Arch, that can train some different skills. Then there is another skill trainer (and level 20 crafter) at the Riverside Province (Mission order: Tutorial - D'Allesio Seaboard - Divinity Coast - The Wilds - Bloodstone Fen - Aurora Glade - Riverside Province) staging area. Also from Northern Kryta Province, one can get to the Farmer's Market, which has level 19 crafter, and to the Cursed Lands and beyond.
Didn't finish exploring but has a grand time doing the Cursed Lands with Sirian and some random players, which built up my death count.

Showed Sirian the way to Captain Greywind, Farmer's Market and Cursed Land, so if interested, bug him. I would show you myself if I am still playing, but I am not, so...
Ah, death count, /deaths to check yours. There are /age, /health, and some other too, I think it's on the guide hosted on Guild Wars site.
Thanks again for a nice ending to my game tasting, Hawkmoon, Sirian, Smegged and the rest that my sleep deprived mind cannot remember!