From: Eric DUMINIL [mailto:eric.duminil / gmail.com] 
# For example, I would not know which file I should retrieve on:
#  'ftp://ftp.org/DATA/mike'
# but
#  'ftp://ftp.org/DATA/{user_name}/{year}/{month}-{day}.txt' would do
# just fine, so that I could, for example, get this hash:
#  {:year=>"2005", :user_name=>"mike", :day=>"15", :month=>"10"}
# for this filename:
#  'ftp://ftp.org/DATA/mike/2005/10-15.txt'

very nice.
but would it be more practical if we delineate a variable just like we used to in ruby inline string; ie, use #{var} instead of just {var}

this would be handy like, if i want to rename or move all folders under /mike/2005/ to /mike/2007/ eg.. the retrieval and assignment string just stay the same...

kind regards -botp