One of the best feature of Aweber eMail form creator is, you can have extra field apart from Name and eMail. For example, if you need to get the Address or Phone number from your subscribe, you can do that by adding a new field. (The step is easy to do and even with zero design and coding skills you can do that). What I suggest is, simply select any template from the page and you are good to add Aweber sign-up form on your blog.
I’m not sure but as far as I can remember (or at least about 2 years ago) I found a function to activate the subscribers without their needing to opt-in (even though a warning from Aweber would pop up). I lost about 70% of my subscribers in my very small list back then when I changed, but I’ve been able to grow it ten-fold since. And I used opt-in, because I didn’t want anyone to complain to me later.
Before you can send AWesome emails with AWeber, you'll need someone to send it to. The easiest way to begin building your list is to import contacts that have opted-in to your email list, or gave you permission to send them emails. These could be subscribers you've emailed from another provider, or a list of contacts that you've built through your business.