I have created an app for Mac OS X that displays trades from MtGox in realtime.  

It doesn't poll but instead opens a socket (to my realtime messaging server) that is fed with updates as they happen from the MtGox websocket service, so you see trades and prices with sub-second latency.


MtGoxWatcher, OS 10.6+, Intel-only (32 and 64 bit)
Download and info:  http://sneak.datavibe.net/projects/mtgoxwatcher/


Source code is up on GitHub for the hacking (linked to from the project page above).

Feature requests and suggestions are welcome!

Best,
Jeffrey Paul <sneak@datavibe.net> (@sneakatdatavibe)

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