Hey, thanks a ton for the prompt response!

1) Could someone enlighten me with the details of the "Social worker" category and how does the entry of occupations in the list works? - learn to use Google (link removed)
That link has something called "Employment Requirements" which mention the need of having a Bachelor's degree in Social work, which I don't. While this clearly means that I would not be able to get a "similar" job in Canada (which I don't intend to anyway), does this also mean my PR application won't be accepted too? I would obviously try to find a management-related job in Canada after going there.
2) Would exact 1 yr work experience be enough? - yes, but I don't think your will get enough point unless you know French very well and have a relative in Canada.
I did check the points requirement and I get exact 67 points with the 1 yr social worker work experience. But anyways, I would check that again, and if I fall short, I could always learn up French quickly.

3) My biggest concern is, what if I do this job for one year, and then when I go to apply, the category is no longer there? - yep, that is the problem. You work for one year, earn the experience in that occupation and they (might) take it off the list.
Exactly, so what is the solution to that problem? Is there anyway to predict whether the category will still be there or not when I apply, say in May-June 2012?
Let's say that when the new list comes out this July 2011, the category of "social worker" is still there, do they accept ALL applications for that category until July 2012? Because if that's the case, I can be sure I would get in because I will work from May 2011 to May 2012, and quickly apply before the next list in July 2012!