[OpenLayers-Users] can openlayers mix projections?

[Wendell Turner]

I'm using geoserver+openlayers but ran into a problem about
projections.

I would like to use nexrad radar data as an overlay.  This
works fine when the OpenLayers.Map is
  projection: "EPSG:4326"

However, the map, when converted to that format (with
gdalwarp) looks somewhat fuzzy, and the circles on the
map are not circular.

When I convert them to EPSG:3395 (WGS84 World Mercator) and
use that in the OpenLayers.Map, the map looks much sharper,
and the circles now look circular.  However, I can't change
the base layer to anything else (e.g., NASA Global Mosaic),
and the nexrad data (from
http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi)
doesn't load either.

Can OpenLayers do this?  That is, have a base map that is
3395 and still use nexrad overlays?  Is there somewhere else
that supplies nexrad radar data in different projections?

Thanks,

Wendell