[identity profile] milkyxduckie.livejournal.com 2009-05-02 10:36 pm (UTC)(link)
There's a fic named The AIM Chronicles written by [livejournal.com profile] asm614
http://community.livejournal.com/bjfic/tag/asm614

[identity profile] milkyxduckie.livejournal.com 2009-05-03 11:09 am (UTC)(link)
I'm sorry to mention this... but this one is still a WIP if I'm not wrong...

[identity profile] abrokencompass.livejournal.com 2009-05-03 01:45 am (UTC)(link)
http://www.livejournal.com/tools/memories.bml?user=discothequey&keyword=Brian+%26+Justin:+The+IM+Sessions&filter=all
The IM Sessions (http://www.livejournal.com/tools/memories.bml?user=discothequey&keyword=Brian+%26+Justin:+The+IM+Sessions&filter=all) is by discothequey, and is the second/interlude of her series starting with Something Beautiful. The whole story is told in IM, and is probably the most well-known IM fic out there. The whole series is amazing.

[identity profile] abrokencompass.livejournal.com 2009-05-03 04:15 pm (UTC)(link)
No problem. Go forth and read! Also, should have mentioned that absolutely anything she writes is beautiful, and the third story in the series is updated regularly.

[identity profile] vlredreign.livejournal.com 2009-05-04 01:08 am (UTC)(link)
Please update your post. Thanks!