The Windows Live Essentials Wave 4 Beta is now available to download.  The WLE Wave 4 Beta suite contains updates to Photo Gallery, Movie Maker, Mail, Writer, and Messenger. Additionally, it introduces a new service, Live Sync, which replaces the Live Mesh technology preview. The new betas of Windows Live connect to photo and video sharing sites (SkyDrive, Flickr, YouTube, Facebook, SmugMug), social networking sites (Facebook, MySpace, LinkedIn), email services (Hotmail, Gmail, Yahoo! Mail), blogging platforms (Spaces, WordPress, Blogger), and document productivity (Office Web Apps) services. The beta requires Windows Vista or Windows 7 and is available in English, French, Dutch, Japanese, Portuguese, Simplified Chinese, and Spanish languages. For more information, check out the Inside Windows Live blog.