***Update***
Well I finally got a hold of someone who used to work at this place in question, and when I told her of my situation, she told me that depending on the area I apply to I may need to have some sort of license, which is not mentioned in any job postings. Also, when I asked about their hiring procedures she added, "You really have to be aggressive with these people."
The advice I got on this thread was divided between "Don't contact them again; you'll look desperate" and "What have you got to lose?" Given this new information, I'm thinking it isn't such a bad idea for me to contact them about the jobs again. After all, someone who worked there said I needed to "be aggressive."
But...I don't exactly know what "being aggressive" means here. Hiding in the bushes outside of the hiring manager's house seems
too aggressive
. What do you think would be an adequate plan of action? Should I just call and leave a voicemail for HR and explain to them that I saw the jobs remain posted and wanted to know if they were still looking for someone to fill any?
Should I more pointedly ask if they would be willing to look over my new resume and consider if I'm better qualified?
How do I find out if there is any specific license I need for any of the positions so I know from the get-go if the reason I've been rejected is based on a qualification they never told me about?