I am interested in becoming one...what more can you tell me? I'd appreciate any info!

Well Easybreezy:
The nurse consultant is an educator.
The good news is you are capitalizing on information you already have (if you are an experienced nurse) and it can be flexible and lucrative. Moreover, it's an opportunity to educate the community (including attorneys) regarding nursing as a profession!
The other news is... the uninformed may see you as a traitor. You will have to continue to educate others within your profession to view you as the asset you are. That is, as a professional consultant, you render the right opinion - not the popular one. This not only admonishes or weeds out those among us who probably shouldn't be practicing, but it can also exculpate those who have performed their duties properly!!!
There is no harm in looking into it further.