BTCameraControl

Using this app, you can take photo with Digital SLR camera via Bluetooth. You need to make Bluetooth receiver by modifing remote cable. You can get all information to make receiver from folloing url:
http://bit.ly/PED16K
This receiver uses following micro computer:
http://bit.ly/PIXjy5
Source file for this micro computer is also available from the url. But it might not work well with Sharp's phone.