The National Park Service has updated and upgraded the maps on individual parks’ web sites.
They’re basically high-res scans of those Park maps they hand out at Visitors’ Centers — so while they’re not really suitable for hiking, they are great at getting an overview of a specific area you’re planning on visiting … and will at least show you which trails are most likely to be crowded.
There’s a small green rectangular button beneath the banner image on each park, which will fire up the streaming, zoomable flash map. Previously, clicking on any map link on an NPS page would open up a PDF map, which would either display the same information or take down your entire computer with a browser crash.
So yeah, these flash maps are a marked improvement.