Well, the most important parts of the article are these:
"The e-mail attachment that spreads the worm via Microsoft Outlook has the following name: Psecure20x-cgi-install.version.6.01.bin.hx.com. The subject line and body of an infected message will contain a period only-no text.
and
"If an infected machine connects to AIM, the worm sends one of the following one-line messages to AIM users listed as contacts:
* btw, download this
* I wanted to show you this
* please check out
* hey go to
* see if you can get this to work
* this is cool
* tell me what you think about
* try this
* I almost forgot about
* I like this
* What about
* Have you seen
* Interesting
* lol
* wow
* whoa
* neat
* cool
* hmm
* psst
* hehe
* haha
* silly
* weird
So, if you get a strange message from one of the friends you regularly talk to through AIM telling you that they received one of those messages from you and you know you didn't send it, your computer has probably been infected.