All these applications are available in the Appstore. Many more to come...
vBookz, powerfull and multilingual ebook reader for iPad
It speaks, the indispensable travel companion
Translate now, translate words and sentences
Vox Trek: worldwide turn by turn GPS navigation with text to speech directions
sayIt : simple and intuitive type and talk application
RSS Speaker : the app that speaks your favorite news and blogs to you (5 languages)
AudioGuidia: turn your iPhone into a smart audio guide to discover Paris
myLanguage Pro: a robust and comprehensive translation solution
Geolives: discover and share audioguides everywhere!
SurfnSpeak: listen to your RSS feeds with Acapela voices
Klaus: English to German phrasebook
Sygic: offline GPS navigation
Roadee: first iPhone GPS application based on OpenStreetMap
Twuner: listen to Tweets on your iPhone
Tick Talk : a clock reading RSS feeds
JustTouchIt: a Indonesian to English lexicon
Proloquo2go : very attractive, both in cost and features, AAC application
Speak it!: simple and sweet type and talk application
read2me: a document reader using Project Gutenberg
Future Apps iSpeak: translation software based on Google Translation (11 languages)

Calling all savvy iPhone developers: connect to www.acapela-for-iphone.com and enjoy the number one website for talking apps