Since things move so quickly in the Clint/Natasha tag at AO3, thought I'd take a sec to link to a story that caught my eye there last night since I haven't seen it posted here. "Vulnerabilty/Control" (part 1 of 2, looks like) by iminthewrongstory, set pre-Avengers, is well written, very in character, and extremely hot. I definitely recommend checking it out (just make sure you read the warnings first if that's a concern, of course).