Luke Wroblewski talks through the changes in the Twitter sign-up process and how it improved their engagement measures.

Keir Whitaker on a tweet embedding script by Robin Sloan.

Debbie Reese on the Twitter exchange with Neil Gaiman that ensued when she called him out for a comment he made to the press.

Twitter messages swearing at Tony Abbott.

Shelly Powers on the recent Twitter outage, the fate of Delicious since the Microhoo! deal, NetNewsWire since the Gmail move and generally how to look after yourself in “the cloud.”

Clever comparison tool by Dan Benjamin that visualises the shared followers and friends of two Twitter users.

Four bit.ly XSS vulnerabilities discovered in Month of Twitter Bugs, and it took betaworks a while to fix them.

Tweet editorial and workflow “corporate” (whatever that means) web app.

Social site status-synching service (by the sea shore).

Overview of CoTweet Twitter client for managing Twitter workflow.

Eliot Van Buskirk on the odd story behind Twitter’s birdie logo.

Daniel Sandler is experimenting with using Twitter for comments on his weblog.

Apocryphal Twitter accounts based on old diaries.

Paul Smith is raising money for charity on Twitter by asking people to sponsor him to travel as far as he can using only rides and accommodations offered by people following him on Twitter.

Dan Goodin on the Twitter clickjacking incident.

Scott Schiller shows that the Twitter clickjack scam uses iframes to position a hidden link over the "Don't click" text—if you're logged in to Twitter when you click it, then your browser would generate a post on Twitter that propagates the message further.