JpegSplorer is a free Adobe InDesign script that helps you browse the valid JPEG links of the active document.
JpegSplorer will open a dialog with a navigation system based on scrollable thumbnails and a preview area.
Installation: Open the "Scripts" panel in InDesign, select the "User" folder, select "Reveal in Finder" from the drop-down menu on the top right side. Copy the JpegSplorer script to the "Scripts Panel" folder in the opened window.
Usage: Run InDesign, open a document, create jpeg links, exec the script from your scripts panel (Window > Automation > Scripts [CS4] or Window > Utilities > Scripts [CS5]) then double-click on the script file name.