FYI: those tickers exist since ages ago. And MtGox has an api for other scam coins apart from LTC.
Ok, try to check some other coins. For example, FTC:
http://data.mtgox.com/api/1/FTCUSD/ticker{"result":"error","error":"Unknown item requested","token":"invalid_item"}
Mmm... maybe XRP? Why not?
http://data.mtgox.com/api/1/XRPUSD/ticker{"result":"error","error":"Unknown item requested","token":"invalid_item"}
TRC?
http://data.mtgox.com/api/1/TRCUSD/ticker{"result":"error","error":"Unknown item requested","token":"invalid_item"}
Only LTC and NMC (namecoin) APIs are working:
http://data.mtgox.com/api/1/LTCUSD/tickerhttp://data.mtgox.com/api/1/NMCUSD/ticker{"result":"success","return":{"high":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"low":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"avg":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"vwap":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"vol":{"value":"0.00000000","value_int":"0","display":"0.00\u00a0NMC","display_short":"0.00\u00a0NMC","currency":"NMC"},"last_local":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"last_orig":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"last_all":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"last":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"buy":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"sell":{"value":"0.00000","value_int":"0","display":"$0.00","display_short":"$0.00","currency":"USD"},"item":"NMC","now":"1372024293042025"}}
EDIT: Is Namecoin a scamcoin? Of course no. If MtGox is also intended to start working with NMC in the future, it's also very good news.