I have made my front-end website in Wordpress which is acceptable for me, i wish to produce the member/staff area in Drupal because it has more functionality with Google paperwork and Mediawiki.
I'm wondering if it is possible that i can share logins between both sites, therefore if i register a person using blogging platforms, they'll have the ability to login around the Drupal site aswell?
OpenId will be a method of doing it , apart from that it ought to be easy to write a function to retrieve the Wordpress customers info in the database and make corresponding customers in Drupal. The function would then be known as each time a new user is produced. Both platforms are very well recorded, therefore it should not be too hard to sort out.
Now, I understand you've made your point obvious about using both Wordpress &lifier Drupal , however it does seem a little like overkill understanding that whatever that you can do in Wordpress should be easily possible in Drupal... however i digress )
You should use saml as the solution for single sign up and provisioning. Is standard and several companies uses it.
Check simplesamlphp , an open source with good documentation, active project and nice comunity.
Also google has saml support and simplesaml let easy handler it