YES, you need mobile.

WHY?...here are some facts.

Currently 1/3 of humankind has mobile internet access, which is twice as many as the number of internet-connected PCs.

50% of the world's population is expected to have access to the Internet through a mobile device in 3 years! Mobile advertising spending in the US is projected to surpass $7.5 billion by 2013.

Today, there are about 2 billion users of SMS text messaging worldwide. According to industry studies, over 80% of the cell phone users are willing to receive opt-in text messages.

Mobile has a low entrance cost and an ROI that is limited only by creativity and drive.