Welcome to the 2.0 redesign of Dingtweet.
Dingtweet no longer uses the tweetcraft base and has been rewritten to send the /share slash command when you level. That means it'll pop up Blizzard's own tweet system, and you still need to click share.
The slash command is currently disabled as the focus was on getting the core working first.
PLEASE BE WARNED: If twitter is not enabled, Dingtweet will silently fail as it'll attempt to send /share and /share does not generate an error if twitter is disabled.
As of 1.6, Dingtweet has a slash command.
You can type
/dingtweet current
to find out the current minimum level it'll start tweeting - default is 16.
Any number after /dingtweet will change the minimum tweet level to that number. For example:
/dingtweet 10
will change the level to 10. This applies to all characters.