...Wow. I'd set aside a week just for reading, if I were you. =)

Seriously, though, there IS a ton of new, awesome material. Since Symphony of the Sword was an ongoing thing when you left, I'd suggest maybe seeing what's the last story from there you remember? The What's New page doesn't go back that far (and can you imagine if it did? Yikes.) but it leads directly into the modern storyline.

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Fearless creatures, we all learn to fight the Reaper
Can't defeat Her, so instead I'll have to be Her