(AVAV, RAX, RPXC) CRWENewswire Stocks to WatchRackspace Hosting Inc - RAX - reported Fourth Quarter 2011 Results, posting Net revenue of $283 million, up 7.1% sequentially and 32% year-over-year. For the fourth quarter of 2011, RPX Corp - RPXC - posted revenue of $42.4 million, a 43% increase year over year