did the Hdip in comp science in UCC in '99-'00, and it was grand. Subject matter was mixed, some of it helpful, some not so much...
A young nervous guy does network topologies and technologies - probably the most hands on and worth knowing. another guy went through basics of computing, a crash course in hardware theory in effect, not bad if you end up working with servers, pcs. the SQL stuff is real low level but fills the CV, and the Java lecturer was so bad we signed a petition to get rid of him - 38k irish a year for reading a book at us... So the second half of the year he was time-sharing with a very smart indian feen who knew java, but whose accent and handwriting were impenetrable. two other modules i've plain forgot!
Was it worth it? I blagged my way in to the esb server team, so yeah, it's a foot in the door, but if you want to program, it's not necessarily the way to go.
Coding wise, all it had was java, and that was poor. Webwise, no html, xml, etc. I was lucky, i ended up working in a field with the most relevance - hardware and networking. otherwise skip it.
the other thing, if you're looking for work in cork, then skip it - network admin roles in cork are rarer and demand fully rounded experience (and are mostly shiftwork in call centres, as there's few big enterprises based in cork), whereas there seem to be loads of coding jobs for sales and manufatcuring.
Look at monster and see what jobs demand, and compare to what the dip offers is my advice.