Seems adsense for domains are currently being rolled out globally. My adsense account now displaying adsense for domain setup under my adsense account. But now word officially yet on to what countries they have implemented it, but since I am not from North America and having an Adsense for Domains setup in my account (currently as PH publisher) with English content.

Google help presents an easy way on how you can setup your unused domains to display adsense. Normally can only be done through domain parking sites like Sedo.

See below how to setup adsense for domains straight from adsense help.

This is for Godaddy since I am using godaddy as my domain registrar, you can find other ways in the link provided above.

Creating a CNAME record:

1. Log in to your account at www.godaddy.com.
2. Open the Domains tab and select My Domain Names. You’ll be directed to the Manage Domains page.
3. Click the domain that you’d like to use with AdSense for domains.
4. Click the Total DNS Control And MX Records in the box entitled Total DNS Control.
Note: Adding entries to the Manage Subdomains section does not create a CNAME record.
5. Click Add New CNAME Record. If you’ve already created a CNAME record for the address, click Edit next to the existing CNAME record.
6. Step 1: In the ‘Host Name’ field, enter ‘www’
Step 2: In the ‘Points to Host Name’ field, enter pub-xxxxxxxxx.afd.ghs.google.com (where pub-xxxxxxxxx is your unique ID listed on the AdSense setup page)
Step 3: Leave the default value in the ‘TTL’ field.
7. Click OK, and then click OK again. If you’re editing an existing CNAME record, click OK.

Your CNAME record is now configured to point to Google. Please now follow the steps below to set up your A record.
Creating an A record:

1. Sign in to your account at www.godaddy.com.
2. Open the Domains tab and select My Domain Names. You’ll be directed to the Manage Domains page.
3. Click the domain that you’d like to use with AdSense for domains.
4. Click the Total DNS Control And MX Records in the box entitled Total DNS Control.
5. Click Add New A Record. If an A record already exists for the address, click Edit next to the existing A record.
6. Step 1: In the ‘Host Name’ field, enter the @ character.
Step 2: In the ‘Points To Ip Address’ field, enter the IP address 216.239.32.21
Step 3: Leave the default value in the ‘TTL’ field.
7. Click OK, and then click OK again. If you’re editing an existing A record, click OK.
8. Follow steps 5 through 6, adding three more records using the IP addresses 216.239.34.21, 216.239.36.21, and 216.239.38.21

Your A record is now configured. Keep in mind that changes to DNS record settings may take up to 48 hours.

Bulk Editing Option:
Once you’ve finished configuring one of your domains with AdSense for domains, you can copy that domain’s settings to bulk edit other domain settings using the copy button in the Total DNS Control page for the configured domain.