Is this using the iHackernews API or did you roll your own? (I'm guessing the latter, since you reference jsoup.org?)
The iHN API has been very unstable for me lately, but all other HN readers for Android seem to use it (or their UI is just so bad it borders on unusable).
Do you think the CPU cost of parsing the HN soup yourself is significant compared to pre-chewed JSON from an API (say, iHackerNews)?