TwitterKeys is a service developed by the folks over at The Next Web Blog that allows you to insert certain Unicode characters in your tweets. Instead of posting that you have a conference call and coffee date before you head to the airport this afternoon, you might tweet something like “☎ then ♨ before ☞ ✈” To address the challenge of trying to remember all these great characters, @bomega and @sandervdv created a bookmarklet that brings up (more…)