Okay, you guys, I love you all, but I am not:
1. LJ tech support
2. Jaida or Rave
3. An antivirus guru
Please stop asking questions about LJ security here.
If you clicked the Shoebox link, even if the link was dead, run a viruscheck to see if you have any keylogger programs on your computer. If you don't have a program, somewhere early in the Picking Up The Pieces tag (which this entry is tagged with, for grate efficiency) there is a recc for a good antivirus software. If you have a Mac, you are likely a-ok. AVG and AdAware are good; you can find them easily via Google.
I don't know what Jaida and Rave will do. It depends on whether they want to reup Shoebox and Rave wants to recover her journal. I don't have contact info for them but judging from my comments they have both been made Very Aware of the hack, so I recommend against notifying them further.
The best way to keep this from happening to you is, well, first, Don't Be Internet Famous. The hackers are targeting high-traffic blogs or people who moderate high-traffic comms. Second, make sure that the email address you used when you opened your LJ is still valid and in your control. If it is not, go to
https://www.livejournal.com/set_secret.bml and set yourself a voluntary "security question" that LJ will ask before assisting you in changing your password. This will prevent someone else from "changing" your password for you. OBVIOUSLY if you suspect you may have a keylogger on your system, run a viruscheck before you do this.
In the words of the great Douglas Adams, DON'T PANIC already. :D