The astronauts are just finishing getting suited up in their Launch & Entry suits. They aren’t too far away from going on the walk to the AstroVan and the ride out to the pad.
There is a concern with weather for a Return To Launch Site capability. Cross your fingers and hope they don’t scrub.
NASA says everything is GO so far. All the TAL sites are available with good weather should the Shuttle need to abort and not return to KSC.