Bruno, the other thread, on a West Coast Productions copyright infringement suit filed in the District of Columbia, is in the Computers/Software & Internet section of the forum - "Illegal Downloading."
I am not sure why it was locked.
There are resources provided in that thread (that will not be repeated here) and these resources can perhaps be of some assistance to those looking to quash the subpoenas served on their ISPs and/or to those looking to file motions to dismiss.
You can file a motion to quash and/or a motion to dismiss, or you can let your ISP comply with the subpoena and release your identifying information to West Coast Productions. Once West Coast has your identifying information, they will probably send you a "demand" letter, informing you that you are being sued for copyright infringement, and asking you for X amount of dollars to settle the suit. The settlement amount may or may not be negotiable. It is also possible (perhaps not probable) that West Coast will skip the demand letter entirely and you will just be served with a complaint and summons.
How much West Coast will demand, if you receive a settlement letter, is a question mark. The amount will undoubtedly be less than the statutory damages that could potentially be awarded should they take the matter to court - then again, a court could award less. The amount could be less than what it would cost to have an attorney handle the matter, or it could be more.
It really depends on all of the facts and circumstances presented by each particular John Doe defendant.
You may wish to check out eff.org's USCG v People and find the September 10, 2010, "Motion to Quash Subpoena" (a pdf file), to get an example of the form used for a motion. Yours will not be exactly the same, nor will yours need to be as long or as detailed, but you will want to provide laws and case law to support your motion, as shown in the EFF motion. Some of the laws and case law cited may be useful to you in your own motions.
I really recommend that all of you consult with an attorney in your area - legal aid clinics, law schools, or organizations like the ACLU may be good sources of no-or-low cost legal assistance. This is the best way for you to get information and advice tailored specifically to your own particular needs and situations.