Start coding the flickr mashup and keep your mind open during the process. It'll morph - you'll see something you can do. Other advice in this thread is sound o

Start coding the flickr mashup and keep your mind open during the process. It'll morph - you'll see something you can do. Other advice in this thread is sound on the general idea creation process - I would also add talk to people! Talk to people with problems, talk to an underserved group, talk to your friends and family, etc.