Lawsuit?

One of my former coworkers is encouraging me to sue, based on discrimination. I might have a case:
1) they lowballed the (informal) offer when they supposedly wanted to bring me permanent (even the gal that I first worked for there said it was an insult).
2) they said they'd get back to me once they had a "job description" (the initial offer was for a junior developer).
3) when they came up with a job description they used it to hire, permanent, TWO younger, ablebodied, males.
4) the day that I was sacked, they had announced that the only other female in my group was leaving.
5) they had a female build/release contractor, very senior, and treated her like a flunky. They let her go after she had to take extensive family leave over the holidays.
6) There are now only three women in all of engineering, and two of them are in the desktop area. Most of the women are in marketing, sales, ops, qa, and administration.

What do you think? I'm wondering if maybe even they slight sniff of a lawsuit would have them quaking in their boots... :-D