When I write LaTeX files I run "Typeset & Preview" quite alot, and therefore was annoyed by the fact that I manually have to scroll the preview window to the current line in my TextMate. Hence I customized the "Typeset & Preview" command using TeXniscope's quite useful AppleScript interface. I replaced the line
--- start --- open -a "$V" "$PDF" --- end ---
with
--- start --- open -a "$V" "$PDF" osascript << EOF tell application "TeXniscope" refresh the front document the front document goto line $TM_LINE_NUMBER of source "$TM_FILEPATH" end tell EOF ---- end -----
Perhaps you find that useful.