The Stonesoup cookbook was featured here in June: http://thestonesoup.com/blog/2010/06/a-free-e-cookbook/ I've switched almost entirely to that book — 5-ingredient, 10-minute recipes. It is quicker than eating out, and my veggie intake has tripled.
Kochan's book is good, but it is far from the "real world" when it comes to Cocoa programming. You don't really need most of what's in there. Just jump in with Hillegass' book and you'll be programming in cocoa much more quickly (I've used both books).
Good: (i) Sign up for a free trial button obvious; (ii) Your logo at the top looks good; (iii) the one-minute tour is a good idea (but I couldn't get it working in Safari, so I couldn't watch it).
Needs improvement: (i) there is too much going on, (ii) it looks cluttered, so I'm not sure where to focus my attention; (ii) you might have your 4-picture header scroll automatically (I like 2 and 3, 1 looks way too busy, and 4 looks way too sparse); (iii) under "Customer Testimonials" (plural) you have only one testimonial - rather than announcing that there are testimonials, reduce cognitive load by having a bit quotation mark or something instead; (iv) I like the "the world best sell with CRM", but perhaps have it closer to the bottom; (v) perhaps have one "download now" button instead of several links (for the sake of appearing cleaner); (vi) I really don't like the "supports mobile e-mail" banner at the bottom: I know it's the sun, but it looks like a nuclear explosion, and apart from my own personal feelings about it, the colour scheme looks misplaced compared to the rest of the page.
If I had to sum up: make it simpler. A few (2 or 3) bullet points, a download button, a big "sign up" button. A testimonial.