Yes, version for PRS-350/650/950 has been just released
Download it from
http://www.ebookapplications.com
Main features:
-Support for all major ebook, image, compression audio formats.
-In-book dictionary
-Ability to install additional dictionaries and fonts
-Simple and intuitive interface, fully functional file manager and many other features
When alternative firmware is installed there is easy way to return to original fimrware
Supported formats:
-Books: PDF, DOC, EPUB, RTF, HTML, CHM, TXT, DJVU, FB2, PDB, PRC, TCR, ZIP, RAR ---including multi-file ZIP и RAR compressed files
-Comics formats: CBR, CBZ
-Image formats: JPEG, PNG, GIF, BMP, TIFF, PSD, PICT, PCX, PGM, PPM, SGI, TGA
-Music: MP3, WAV, FLAC, OGG, AAC
All features of alternative firmware:
-Quick start (less than 5 seconds)
-Simple and convenient interface
-Fully functional file manager with support of all types of file operations.
-Flexible user settings, such as fonts, page settings, supported languages, custom fonts etc.
-Convenient in-book navigation
-Bookmark, page and page layout settings
-Flexible settings for PDF/DjVu,CBR/CBZ and images scaling (zoom).
-Bilt-in dictionary, support for custom dictionaries.
-Screen capture
-Current version has six applicaitons: Chess, Sudoku, Calculator, Schultse table and Dictionary in addition to the built–in dictionary.