shows current sell value of 1 BTC, and a calculated value of [x number of coins * current btc].
uses mtgox, eg https://mtgox.com/api/1/BTCAUD/ticker
no need to login to anything at all, which I prefer.
and this is how it looks:
variables, change to suit:
how many coins you have.
your preferred currency (USD, AUD, CAD, CHF, CNY, DKK, EUR, GBP, HKD, JPY, NZD, PLN, RUB, SEK, SGD, THB)
can be up to 6