In Axure 7.0, Update To Latest Version | Axure, you can now set the HTML input field type on Text Fields.
Some of these, like Email and Phone Number, are definitely most helpful for mobile site building. And others like Date and Time aren't supported by all browsers (i.e. IE). However, if you can live with the shortcomings, this can be a super quick way to get your necessary Date Picker, Password, or Number Field into your HTML.
Here is the complete list and quick description from the website, http://www.axure.com/widgets/text-field:
Text: Basic text entry
Password: Masks text being entered
Email: Prompts email keyboard
Number: Prompts numeric input
Phone Number: Prompts the dial pad
URL: Prompts the url entry keyboard
Search: Adds search button to keyboard
File: Adds a file upload button to the design
Date: Prompts the date selector
Month: Prompts the month and year selector
Time: Prompts the time selector on mobile
Check out different browser's support of these HTML5 elements here: HTML5test - How well does your browser support HTML5?.