Looks like everyone is looking for good smartphone application these days. Below are some apps that CIO.com has come up with that may be worth looking in to. 

Blackberry
http://www.cio.com/article/530413/Free_BlackBerry_Apps_Your_Smart
phone_s_10_New_Best_Friends?source=CIONLE_nlt_enterprise_2010-02-10 

Android
http://www.cio.com/article/535617/Android_Apps_for_
Business_Users?page=11#slideshow 

iPhone
http://www.cio.com/article/525963/10_Great_iPhone_
Apps_for_Business_Users_at_a_Glance