If you have a Skype account, you can add credit to your account to purchase SkypeOut time to use your mobile phone (with 3G data plan or WiFi) to make Skype calls using IM+ for Skype. Very nice!
SeeHandango for trial download.
Skype wirelessly anywhere in a cost-effective way
IM+ for Skype is a mobile application that enables voice and text communication with other Skype users and provides cost-effective calling to landlines and mobiles.
* BlackBerry handhelds
* Symbian S60 v3 phones
* Palm OS
* Java powered phones
* Windows Mobile Pocket PC beta version will be available at the end of July
* iPhone – Coming soon