Not sure if the location/path to program's own webpages here on PortableApps are static enough to make this possible. But would be nice if the entries in the App Directory dialog could link to the corresponding portableapps.com pages if you want to know more about a program before downloading it.
That's coming in an upcoming version. Visit App Homepage in the right-click menu. It's part of the PA.c Format spec for it to be in there.
Sometimes, the impossible can become possible, if you're awesome!