If anyone is any doubt about the demand for CCNA candidates then have a look at this, quite interesting:
http://www.itjobswatch.co.uk/jobs/uk/ccna.do
This is just in the UK, therefore I would imagine the worldwide skills shortage it huge. I've never actually looked into this before, but these facts and figures took me by surprise a bit....I knew CCNA was a good cert but didn't know there was such a skills shortage/demand.
Check the salaries out and could some people outwith the UK post average salaries for similar positions in their respective countries