Hope this helps anyone who was in my position. I know a lot of people are not going to like this and I've made all the arguments against it myself, but my website is very important to me and earlier this year I finally decided that I am going to have to break down and learn to use something else due to the fact that iWeb is eventually a dead end no matter how you look at it. I'm a writer and felt I didn't have a lot of time and energy to devote to learning something new and complicated.
I bought Freeway express and Sandvox at the App Store and also looked (and read) everything I could on the subject of website programs. I also looked at other programs such as Dreamweaver, etc, but nothing seemed to match the ease and flexibility of iWeb which I LOVED. Still, knowing I had to change, I experimented a bit and built a site that met about 3/4 of my expectations with Sandvox and pulled the plug for the first time in years on iWeb. I was surprised and happy, knowing that iWeb is eventually going to become a dead horse. That said, I needed three columns and while there is a forum at Sandvox, no one could solve my column issue (and a few other issues) satisfactorily.
I then read an interesting argument about Wordpress vs iWeb (Wordpress.Org and not Wordpress.Com) in a forum and argued intensely against it because of all the programs I had looked at, I absolutely HATED Wordpress the most. It seemed so complicated, totally counter intuitive and the program most unlike iWeb. But I did like the fact that it is web-based and doesn't sit on your computer as well as SEO optimized. Then some tech guy I know suggested that I quit comparing Wordpress to iWeb and simply look at it as learning a new thing. Once again, I argued intensely against it, but given that Sandvox didn't fully meet my needs, I started experimenting with Wordpress. I finally broke down and bought this cheap crash course which was broken down in small 6-8 minute segments that I could watch at my convince and it worked. I was able to of live with Wordpress with the site I always wanted to have. This is my "humble" Wordpress webite that I built http://johnnyrobish.com.
Lastly and perhaps most importantly, I also wanted to mention that since swithching to Wordpress, the traffic to my website has honestly tripled due to the Wordpress SEO capabilities. Tripled almost instantly! I know a lot of you are going to argue like crazy against Wordpress, but its really a fantastic program with TONS more options than iWeb once you learn it. And you can learn it - because I did Hope this helps and good luck.