Here are some statistics from AdAge that support this:
2.3 times moremobile searches worldwide in fourth-quarter 2010 from the prior period
30%of overall restaurant search queries were mobile in January
17%of overall auto search queries were mobile in January
33%of overall "flowers" search queries were mobile on Mothers Day
6 p.m.-9 p.m.time of day Google sees the highest volume of mobile search
1/3of mobile search queries have local intent
If you business model hasn't built in a mobile component, you may want to pull out that drawing board again.
For our Canadian readers, Happy Victoria Day!