I'm writing from my Galaxy S with CM10 (Jellybean) now. Naturally, it uses Ext (3?) partitions, and resizes the cache partition so I can download apps larger than 30mb from the play store (another interesting file system choice from Samsung).
I use the Opera labs browser. Opera, because despite some parts I don't like, it's the best I've seen at reflowing text to fit the screen (perfect for HN). The labs version, because it supports extensions, and it is the only way I can get something like Ghostery to block trackers while I'm browsing on the phone.
Do you have a particular HN app you recommend?
I was using http://ihackernews.com for a while, because of its mobile-friendly HTML, but it doesn't really offer anything in addition to regular HN with a good browser. Double tapping zooms to a good size, reflows the text, and snaps the scrolling to the new width, so most sites just feel like a "mobile app" anyhow.
Cheers.
The only good thing about that phone (besides the screen) is that it was nearly unbreakable and had a great custom Rom scene. Almost all of the roms replaced the file system.