sub'ing to keep up with the thread. (cool idea)..
much like creating a web app.. and then just editing the .xml file to make changes..etc
anyways.. maybe to get rid of the overhead of accessing the SD card..reading, parsing date.....etc..
maybe read in a 'few' line/variables at a time.. maybe the first 10 to give you a bit of a 'buffer' for smoother/continuous movement..?