Download it here.
Watch out: here comes beta six. This beta has two new localizations: Japanese and Dutch. It also adds some AppleScript properties and a Services menu in the contextual menu. It also fixes a long-standing bug in .Mac syncing regarding resetting data, so that should work better. We're getting late in the process here, but remember: this is still a beta, so remember to back up your data and let me know of any bugs you find.