I'm hoping some of you oh so knowledgable types can assist with a worrying noise that developed yesterday coming form my engine!
on startup, and even when warm i now seem to have (please excuse the attempt at describing this as its one of those hard to describe 'you'd know what i mean if you heard it' kinda noises!) what sounds like a feint grinding / scraping noise... not harsh, just slight, and and occaisional alsmost plasticy rattle.

The car has been running perfectly since it was serviced back at beginning of September, i've got no loss of power or boost that i've noticed, oil & water levels are all fine, temperatures are all fine, it drove fine to work yesterday, then at lunch time i went out and again fine, filled up with SHell juice whilst out, came back to the office, again fine. Started her up to come home and this noise was present straight away... Having no other choice i babied the car home (only 12 miles ish), low revs all the way, felt absolutely fine, now high temps, no loss of boost although i didnt really get up into it, turbs sound fine.
I have got a video of the car making the noise in MP4 format that i took with my phone if anyone wants to have a listen, i'll try and get it hosted on my web space and get a link up here shortly.
I'm baffled and beginning to panic slightly!!! Car is at home now, have blagged mum's motor for now so it's not gone anywhere since last night.

Oh and unfortunately i dont have VAG-Com to check for codes.
Anyone got any thoughts?

Cheers in advance,
James.