Google Mobile App for BlackBerry can now search the cloud to find items in Gmail, Google Contacts, and Google Docs. For e.g., you received an email reminding you to take a look at the checklist. It's been a while since you created the list, but you can say 'checklist' to GMA and find it in your Docs in a couple of clicks. "To do this, on BlackBerry, start GMA and log into your Google Account. Now, either type or speak a query."
Search results for "checklist"
Google Docs: Mountain camping checklist
"Now that you're already signed into Google Account you can launch web-based apps such as Docs or Reader without having to log in again. Google send all your Gmail and Docs searches over a secure https connection. Your password is never permanently stored on your phone, and your account details are encrypted during transmission," explains Google.
More Info: Help center