hmm.. its a good idea. perhaps you should give thought to trying to brand some type of name for this as well and connect to two domains? (if your going to develop a mobile phone Anti Virus that is)
low$XX right now
Mid to high$XX in a year undeveloped.
Massive potential market perhaps. Lots of articles turn up warning about the danger. Doesn't seem to be an extensive amount of software offered to combat the problem (from search Cnet).
Main problems I see here is the length that will prevent this domain from being a first choice selection. Loads of alternatives when you have a 3 word domain.