http://www.engadget.com/ seems to have the worst of both worlds. On a very wide window lines of text do indeed get too long for comfortable reading. On the other hand, on windows narrower than 1000 px, it is necessary to scroll sideways to see the entire screen. While
http://www.engadgetmobile.com/ looks better on a wide screen, it too can require horizontal scrolling as its minimum width is around 960 pixels. In this part of the world there are still a large number of users with with legacy systems where the monitors are set to 800x600 or 1024x768. On the other hand there are an increasing number of monitors with very high resolutions (1600+ pixels wide).
One only needs to look at the MODx site to see the the problems created by both fixed width and fully fluid design.
In these forums, the pages are fluid and always expand to fill the entire width of the window. Even with a resolution of 1280x800 on the laptop I’m using to type this message, I find it more comfortable to read the threads in a less than maximized window. In a 1600px wide window, the lines of text are extremely difficult to follow. On the other hand, at widths of 600px or less, the threads are very comfortable to read.
However the main MODx pages use a fixed wdith layout, and in windows between 800px and 1200px, it looks good. However on windows much larger, the amount of plain black real estate begins to overpower the the relatively small content area. However, on windows narrower than approx 780px, the dreaded horizontal scroll bar appears.
What I like about the Jello Mold approach is the fact the the designer can specify the minimum and maximum widths of the displayed page (assuming the viewer uses the designer’s css). Not only that, we can specify how wide the window needs to be before the page reaches its maximum width. At minimum with there is no outer margin. As the window expands, the outer margin expands slowly until the maximum page width is reached. At that point any further expansion of the window results in just the outer margins expanding.
For example, in
stetsongroup.com the minimum width of the page is set to 600px and this is achieved in a 600px wide window. The maximum width is currently set at 900px and this is reached when the window reaches 1200px in width. Admittedly, on very wide windows, the 900px maximum is beginning to look a bit small, and in future designs I would most likely set the maximum width to around 1000 or 1200 px. I’m not sure that the time is yet right to increase the minimum width up to 800px, but I have found restricting the maximum width to about 150% of the minimum width keeps any readability issues at bay.