ChaCha announced its Rich SMS Advertising solution, which it says can deliver response rates of more than 5% - better than other mobile ad solutions like SMS alerts and WAP banners.

ChaCha already has done some initial campaigns with Coca-Cola, McDonald’s and others. “ChaCha’s mobile answers service is extremely popular with consumers largely because of its conversational nature,” said ChaCha Co-Founder and President Brad Bostic in a press release. “This interactive and trusted relationship with on-the-go consumers can now benefit marketers by helping them more successfully reach their target audience in a non-intrusive way.”

Via call-through or click-through, brands can leverage Rich SMS Advertising to drive users online, to 800 numbers or to in-store destinations. Brands also can tailor ads and target consumers by the specific category of each ChaCha question (for example, by sports, music or politics), by location, time of day or customer profile (a bargain shopper or frequent traveler, for instance). ChaCha said it can now serve more than 28 million impressions per month, growing at 70% month over month.

ChaCha offers its free mobile answers service that uses human “Guides” to find answers to consumers’ questions 24/7 on nearly any mobile device.  Users send a question via SMS (242242) or voice (1-800-224-2242) and receive an answer back via a text message in real-time.