"can't stop the signal" is from the *movie*. don't recall hearing it ever in the series.
what's the purpose of a movie tagline? this one doesn't make sense unless you see it in context.
if there are more screenings (rumours say yes, others say no) they'll be announced, though generally too late, at
http://www.cantstopthesignal.com
fyi, the best source for any news re: joss whedon is whedonesque.com. that's where i got the scoop on this round of previews (for which i have tickets again! yeah, i'm stupid that way.)
and yeah, having seen all of the episodes now (watched all 13 this weekend on DVD), it's GREAT stuff and should NOT have been cancelled. i thought the premise was warped and insane too (sci-fi/western???) but it is MARVELOUS television.
if i had a chance to meet either joss or elvis, i'd meet joss. it may be heresy here, but it's my truth.