Just spreading the word here--Cameron Kaiser released a new app called TenFourFoxBox which generates site-specific browser apps. Read his full blog post, but in short it allows a smoother and faster experience from resource-heavy websites by boxing them into their own browser processes and keeping spinning beachballs to a minimum. I've tried it out and it makes a difference.
Faster browsing is good.
UPDATE: And Adam Albrec has made a spiffy Twitter app out of this, including a custom icon.