I am building a website with wordpress 3.5.2 and using Newsletter sign-up plugin to build my simple form.
My Client is using constant contact to manage newsletter subscriptions and I'd liketo know how to get parameters to make the things work...
It definitely is possible to set up a form on your website with that wordpress plugin and Constant Contact. It takes a bit of configuration, but I can assist you with setting that up if you can send us an email at firstname.lastname@example.org with your account username.
In addition, there is a very similar plugin which is specifically set up for use with Constant Contact and may prove to be simpler to use. You can find that plugin here: http://wordpress.org/plugins/constant-contact-signup-form-widget/
If you have any questions, please let me know and I will be happy to help!
API Support Specialist