En teoria si que puedes seguir con iweb sin mobileme.
(
http://www.disqus.com)
(
http://www.intensedebate.com)
Y tendrías que hacer esto.
Signing up and getting comment code with Disqus.com:
Go to Disqus.com and hit the “Sign Up, Free” Button.
Enter your Site URL, Site Name, Site Shortname, then decide your username, password, and email address you want to use.
You’ll then be directed to step number 2 where you will choose the language for your comments, and some optional features such as providing allowing users to log in with Twitter, Facebook, Yahoo, Open ID, and others, and the ability to share across social networks.
Step 3 is where you will get your install code. Choose the option that says “Universal Code”.
Copy the code that is next to the “1.” (don’t worry about the code in the 2. section) and you’ll now have the code we’ll need in the next steps.
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Signing up and getting comment code with IntenseDebate.com:
Go to InstenseDebate.com and hit the “Sign Up” Button.
Enter in a Username, Email, and Password, and choose the option “I want to install IntenseDebate on my blog or website”, and hit the sign up button.
You’ll then need to check your email to verify the account before you can go on.
Once you’ve verified you email go ahead and login.
Upon logging in you’ll be directed to your dashboard, you’ll see a section on the right side under “Manage Blog/Sites” a button that says “You have not installed IntenseDebate on any blogs yet. Install IntenseDebate.” click on that link.
You’ll then be walked through 3 steps to get the code we need to go on. Step 1 is to enter in your blog/website URL. Do that and hit “Next Step” to continue.
Step 2 is to choose your platform. You won’t find iWeb in the list there so just choose the option “Generic Install”.
Step 3 is where they will give you your install code. On the left side it says “JavaScript Install”, copy the code next to the “1.” and move to the next step.
Saludos.