It might seem like a bit of an overkill with all of these Twitter clones, but Yammer seems to fall into a bit more of a niche. Creating a network solely for you and your coworkers (based on your email addresses), Yammer lets you microblog what you're working on, and check in with your colleagues as well. You can also post updates directly through an IM service. Seems like it could be handy in a company where lots of people work offsite. Check it out here.

A friend just turned me on to this delightfully simple work log, ididwork.com. The name pretty much says it all; log the work that you did, tag it if you like, and ididwork.com will create charts mapping your work, email your logs to your manager (if desired), and schedule work reviews. This is a handy little tool for jobs where you have to log hours on certain projects, or you may be working on site and have to report in your work to your manager. Just a great example on how simplicity wins over and a site without too many bells and whistles can be most useful.

I love stumbling across creative applications of Google Maps, and TripWolf incorporates one of the coolest. It combines the GMap with Q&As (think Yahoo Answers), social networking (integrated with Facebook), and a wide breadth of information to create one of the coolest travel advisor sites out there. Just a quick look around gets great suggestions from users on sites all over the world, including tips from a destination's primary user (or "guru"). Check it out here.

Jacqui Cheng over at Ars Technica writes...

"How many times have you stumbled home after a long night out with
friends, only to plop down in front of the computer and start sending
e-mails that you would wake up regretting the next day? ..."

"Called "Mail Goggles," the Gmail add-on makes sending e-mail from Gmail
more difficult during certain times that you can set manually (while
sober, that is). How does it do this? If you have Mail Goggles
installed—which you can do by going to the "Labs" tab under your Gmail
settings and turning them on—it will force you to answer a series of
math questions before sending out any new messages..."

Read the full article here.

• 72.5% of all users joining during the first five months of 2009.
• 85.3% of all Twitter users post less than one update/day
• 21% of users have never posted a Tweet
• 93.6% of users have less than 100 followers, while 92.4% follow less than 100 people.
• 5% of Twitter users account for 75% of all activity
• New York has the most Twitters users, followed by Los Angeles, Toronto, San Francisco and Boston; while Detroit was the fast-growing city over the first five months of 2009
• More than 50% of all updates are published using tools, mobile and Web-based, other than Twitter.com. TweetDeck is the most popular non-Twitter.com tool with 19.7% market share.
• There are more women on Twitter (53%) than men (47%)
• Of the people who identify themselves as marketers, 15% follow more than 2,000 people. This compares with 0.29% of overall Twitter users who follow more than 2,000 people.