Download the source, go into the BitTicker Folder and find
If you would rather show a different currency and have it be accurate you need to change what info is taken from mtgox.
Folder/File
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BitTicker/StatusItemView.m
currencyFormatter.currencyCode = @"USD"; // Tells what to display, find your code.
BitTicker/MtGox.m
http://data.mtgox.com/api/0/data/ticker.php?Currency=USD // Put this line in or it won't work due to api changes. Put in currency code you want instead of USD.
This is not my project, I just wanted to share it with you all. I had financed the addition of wallet feature for my own use. If others who can code and want to make some money have time I have a bitcoin related app I want to get made.
If I find the time I will help you out and upload a build. But for now I am slammed. The above info should get you good to go though and working.