Adobe has dropped updates for both Lightroom and Camera Raw. According to the Lightroom team's blog, the updates include all the changes of the previous releases, but also correct a few issues. Lightroom 1.4.1 will keep the EXIF time date field of images from being incorrectly modified, and has fixes for Olympus JPEG files and also DNG conversion. And the Camera Raw plugin update also fixes the EXIF problem as well as the Olympus JPEG features.
But that's more than you wanted to know, right? All you really need to know is that you can grab the update either on Adobe's site, or by hitting "Check for updates" under the Help menu for the Lightroom update and using the Adobe Update Manager for the Raw plugin update. Happy updating!