I love Nokia Beta Labs. Ever since I started using Nokia phones again I've been able to find some great experimental applications there and test them out before they're incorporated into the general firmware of Nokia's phones and applications. Some things get trashed, others get incorporated into existing applications. It's interesting for someone like me to see the development process from the beginning like this.
The latest application from the labs is the Custom Dictionary editing tool. This application finally allows us to access the dictionary that our predictive text function works from and see every word in there. We can add words we'll be using, remove words we don't want in there (recently "it-s" got added to mine instead of "it's" thanks to a typo, and I was having hell training the phone to put the right one first) and create the right list for each of us. We can also marvel at the words we've taught the dictionary (you can see both "Coisy" and "Catfiania" have snuck their way into mine, despite my guards and traps) without realising it. The best function of the application is that you can save your word list as a backup file and import those files into the app. This effectively allows you to move your word lists between phones so I can see this feature eventually being added to Nokia's Phone Switch application, as well as the Backup function in File Manager and the Settings menu.
Nokia Custom Dictionary is a tiny application, only 20KB, and can be installed on the memory card or phone memory. It can be downloaded from the Beta Labs. You'll need to be logged in to download it.