I keep waiting for series four to show up on netflix, but if it doesn't soon I'll probably break down and start scouring the dark recesses of the internet for streaming links.

So I'm more of a modern AU fan myself (the anachronisms in canon are a little off-putting), but I do have three canon-era & compliant when they were written fics bookmarked:

Flood (http://linckia-blue.livejournal.com/10950.html) -- PG13 -- which is about Camelot flooding and Arthur and Merlin seriously longing for each other and there is accosting in potato storerooms
all I wanted was a white night (I got a prince instead) (http://archiveofourown.org/works/104574?view_full_work=true) -- Teen + -- so this one is on AO3, but it isn't marked as canon so you might miss it which would be a shame. Arthur makes Merlin warm his bed (literally warm it, because it's cold)
Backdrifts (http://lisztful.livejournal.com/8722.html) -- NC17 -- this one's kind of angsty and filled with pining and Arthur keeping secrets and Merlin worrying that Arthur knows about his magic

(also, these are all Arthur/Merlin because they're clearly boyfrands)

Oh god, I totally understand. I'm also signed up for way more stuff than I have a right to be, including several big bangs. Good luck with yours!