Decode &amp; entites AFTER slicing for entity links, otherwise indices are wrong.
Match avatar boder-radius to twitter's.
Set name to display block.
Add faint dotted line between tweets.
Set Allow Origin header to '*' if it matches anything in the allow_origin config setting.

IE (and maybe others) can cache the response header, and deny if the
same feed is pulled from a different allowed origin.
Tweaks for fitting better in narrow containers.
Never remove entries from the DOM, work around them so php doesn't add "xmlns:default" when they're added back.