I am no longer actively consulting, but I still get requests/offers. This one (for an expert-witness gig) came out of the blue, and without any confidentiality request:

We are seeking an engineer expert in Layer 2 encryption who has designed networks incorporating encryption at the software level. The expert will consult, report and testify. Testifying and patent experience are preferred and a Ph. D. and mobile telephony are pluses.

I never got the chance to serve as an expert witness myself, but I'm told that they can be extremely lucrative gigs. They also come with inflexible scheduling constraints, especially testimony at trial. So, anyone interested? Drop me a line (with a CV) if you are and (if you're qualified) I'll make the introduction.