Can the Yahoo Address book sync with a Blackberry? A Microsoft Exchange account or Lotus Notes can. I don't think reading addresses in Yahoo is possible. What you can do is Sync Yahoo to Outlook and sync the Blackberry to Outlook. Then the address book on the Blackberry will be a copy of your Yahoo, just not syncing wirelessly. I tested the Outlook sync and it worked ok, no worries.
yeah! use Yahoo! Go (mobile application)! and it will automatically sync your mails, calendar, address book etc. you can download that through yahoo.com.