kaneda42the script could check on last.fm when your last upload was and then use that timestamp to avoid duplicate uploads. I'll check that out.
In order to add this funcionality, [in 3 simple steps:]
1) locate the line where it says, "#add it here". 2) After that line, paste the following Two lines: if int(timestamp+iPodDateOffset)<int(int(urllib.urlopen(str("http://ws.audioscrobbler.com/1.0/user/" + "USERNAME" + "/recenttracks.txt")).readlines()[0].rsplit(",")[0]) + 30): continue
[paying attention to the 4 spaces at the beginning of the "continue" line.]
3) replace USERNAME with your username, leaving the q-marks in place.
Avoiding the spam warning