I have just committed some changes to MODX extra TwitterX which now includes the ability to do basic searches, specify multiple screen_names and several bug fixes. Here's a quick summary of what's updated.
Since Twitter has now changed to enforce authentication, this new MODX extra loads Twitter statuses and timelines by using the new (and very annoying) Twitter 1.1 API. You will need to create a Twitter app and get the keys and tokens and this extra will do the rest.
Here's a list of 7 MODX Revolution addons that might not have heard of but will definitely want to use in your next project!