Google’s updated keyword tool is now officially out of beta, and advertisers no longer have the option to go back to the previous version of the tool. This is unfortunate, as the previous version provided more results and keyword variations. However, a couple of advantages on the updated tool include updated statistics and the ability to use the tool without signing in.
In you’re looking for additional or alternative keyword tools, I recommend you check out keywordspy and wordtracker. Both require subscriptions but do offer free trials.