Have you heard about QuickLZ? It's the best thing I've seen in the LZO class. <a href="http://www.quicklz.com/" rel="nofollow">http://www.quicklz.com/</a><p>Edit: Here we go, a list of compression tools ranked by speed: <a href="http://www.maximumcompression.com/data/summary_mf4.php" rel="nofollow">http://www.maximumcompression.com/data/summary_mf4.php</a>