Online video service YouTube is providing presidential candidates with a virtual soapbox that allows them to interact with the online community.

The Google-affiliated website launched the You Choose ’08 Spotlight that encourages two-way dialogue between candidates and voters. The Spotlight feature debuted Wednesday and allows a different candidate each week to create a video for the Spotlight to encourage responses from YouTube users.

This week features Former Massachusetts Gov. Mitt Romney (R) asking users "What do you believe is America's single greatest challenge?"

Click here for more information on the new YouTube initiative