1) Welcome to TweetingMachine Discover the Twitter & Facebook tool that's packed with features and free for 10 days! <-- Nothing here provides value to customers. What is the benefit to them of using TweetMachine? "<h1>Get More Customers With Less Work</h1> Manage your Twitter/Facebook campaigns faster. Try free for 10 days!
2) http://tweetingmachine.com/features/schedule_tweets needs more text on it to rank for [schedule tweets]. Ditto for all of your feature pages. Very important: put buttons on these pages leading directly into the free trial, because they will be large entrances into your site. Build links directly to them.
3) Customer personas: explain what this means for small business owners, marketing managers, and social media consultants. Bonus points for cutesy cartoon characters representing them. (It works!)
4) Quicky question: how many of your customers are ladies? Lots, right? If so: watch my presentation about selling to women, with particular regards to pushing emotional buttons and not using screenshots of software because software is boring.
5) "Try for free" should probably be orange (test test test) and you probably want the hero screenshot to link to that, too. If you installed CrazyEgg you would quickly see that it gets clicked more than anything on the page.