What apps do you think everyone will look for on their phone when they first get it - that are Talkback compatible?

Here's a few of my favourites:

AquaMail - This is a great mail app, it supports pop3, imap and exhcange. It has a "smart inbox" that makes it extremely easy to manage multiple mail accounts within the app. It's great for low vision users too with customisable fonts and high contrast black theme availble.
http://inclusiveandroid.tk/?q=content/aqua-mail

Tweetings for Twitter - This is the most full featured twitter app I've seen to date. It has custom themes too.
http://inclusiveandroid.tk/?q=content/tweetings-twitter

Canadian Weather- Got to know what the weather is going to be like before you leave the house. This app has a ton of information and a great widget
http://inclusiveandroid.tk/?q=content/canadian-weather

Business Calendar Pro - This is the most feature rich calendar app I've found. There is both a free and paid version. The paid version allows you much more functionality including custom themes.
http://inclusiveandroid.tk/?q=content/business-calendar-pro