Webform Rules - Create a Drupal User
You can use a technique similar to what is described in my answer to "How to do a data comparison to submitted webform data when using the Rules module?". For short:


Add an extra Rules Action to Add a variable, with a value assigned to it equal to your [data:ComponentFieldName-value-raw] (and with a data type which equals the data type of your Webform component). Looks like you need 2 variables though: 1 for the username, one for the eMail ID.
In your subsequent Rules Actions you can refer to the value of these variables you just added (that's the clue!).