Re: unemployed and fed up :(
I completely understand your situation. I finished university last year, I studied geology but I found that the mining industry collapse meant I really struggled for a job. I spent lots of time doing good cover letter and cv's, only to sometimes get no reply! It is so disheartening sometimes when someone can't even be bothered to reply. It makes you feel a bit useless.
I eventually got a temp job doing something fairly relevant, mapping! It has kept money coming in and stopped me feeling so useless, but as its a temp job it could end soon which doesn't help nerves.
However I am still applying for permanent jobs whilst working this job, I have found it helps with rejections (or lack of any reply) when applying for jobs because at least I am still busy in my work.
Keep at it, something will (and has to) come around the corner eventually! It just takes time to adjust from leaving the safety net of university and being thrown out into the big scary world of work where there is little help and you're up against each other! May be look at finding some good temp work? I work at Ordnance Survey for brookstreet, I'd recommend having a look at brookstreet they are very helpful and quick at finding you employment and often aren't too fussed about the experience you have!
Keep on keeping on something will come along one day, it's what I have to keep telling myself as well!
__________________
My mind is mine and mine my mind will always stay.