Just saw via slashgeo.org that Tim Schwab has launched wms-sites.com which i guess you could call a similar project to Mapdex, just for OGC WMS services.
Tim uses his knowledge of Openlayers as a preview tool very well.
My list of suggestions to make it even better~ 
- Accept coordinate input searches. eg. Find me all services/layers which intersects/within X1,Y1,X2,Y2 … a common tool used in proper CSW requests
- Allow adding an entire service to preview … i could only manage viewing 1 layer at a time?
- I heard Tim mention it, but being able to load multiple layers across services and output a WMC document would be fantastic
- If layers are reporting scalehints, dump the values to the catalog view
- Add the OL scalebar to preview window
Great work Tim … now if only people added the metadata elements in the first place …
Thanks for the words Chris. All good suggestions. Geographic search is already there - just need to expose it. I’ve added the others to my list.