patch makes link look like http://www.livejournal.com/talkread.bml?journal=lj_dev&itemid=358970&view=3253562#t3253562
which is the same link 'you can view it here' you get when you post your comment.
also, patch is essential for implementation of my email-gate project.
upd: avva pointed that 'view=' method does not respect page breaks for long discussions; updated patch using 'thread=' is here
upd: i decided to leave link in html part as it is, because link's text isn't appropriate for liking to thread and i am not sure how to rephrase it.
i've only modified link that goes to text-only part of email.