Monday, noon ET, marks the deadline for this year's third Knight News Challenge, which focus on ways to use mobile technology to improve news, information, democracy and communities.

Got questions about the contest or the mobile project you're entering? On Friday Sept. 7, 1 pm ET, key staff from the John S. and James L. Knight Foundation will be holding online "office hours" to give answers.

• Join by Skype.You must have the latest version of Skype open and be logged in.
• Join by phone: Call toll free: +1 888 240 2560. Meeting ID: 820229184

Can't make the hangout? Reach Knight anytime by Twitter or e-mail.

More resources:

• Ingredients for successful Knight News Challenge projects.
• Tips from former News Challenge application readers Kio Stark and Ted Han.

The News and Tools for Digital Innovators blog is made possible by a grant to USC Annenberg from the John S. and James L. Knight Foundation.