Steve Kopp just shared status a few hours ago.
For Desktop users who want to use the new elevation analysis services, there is now a patch available to make the hydro services show up in your ArcCatalog window under Ready to Use services. No more "Add ArcGIS Server" connection.
Just want to throw out there that these neat services leverage efforts USGS and EPA have been cranking on for years (with lots of help from the Esri ArcHydro and Spatial Analyst powers that be) on projects such as StreamStats and NHDPlus. The leveraging kind of goes both ways.
Push through that envelope! Woo hoo!