I'm not sure what the interest is for this type of platform, so I thought I'd post here to see what folks say. Keep in mind this is probably for a niche audience, and not the casual buyer/seller on mtgox.

I've developed a cross-platform trading platform that runs within a SSH console(or locally, your choice). It allows command line trading and interacts with the mtgox API. It runs fine on Windows(cygwin), OS X, Linux, and sane variants of UNIX.

Features it supports:
-placing buy/sell orders
-canceling individual or all open orders
-open monitor and balance monitoring(calculates net value of positions)
-live ticker
-real time order book(bid/ask size)
-2 minute, 5 minute, and 10 minute volume averages in a scrolling ticker
-triggers for the price being above/below a set point(triggers could be to buy/sell, send an email/sms, or run an external script.)

If you are interested in purchasing a copy, contact modfoo050@shackhost.net.

I've included a screenshot to show how I use it, this is in an SSH terminal using the GNU `screen` program to provide windowing.