Hello,
openlayers.org server is sometimes very slow so please replace in your maps
http://www.openlayers.org/api/OpenLayers.js
by
http://toolserver.org/~osm/libs/openlayers/latest/OpenLayers.js
So it can load in 0.2s instead of nearly 10 seconds.
(It use now gzip as compression for transfer, so it's really fast.)
Greetings Kolossos