I have thoroughly enjoyed my experience on App.net since joining in November of last year. The conversations are great (256 characters!), the community is fun, and the developers are active in improving the site every day.
The team at App.net has provided 100 free invites for readers of The Pen Addict. Click here to sign up and join the conversation.
You will automatically follow me @dowdy upon creating your account. Hopefully you will feel compelled to continue to do so but no worries if you don't. I also started a blog post only feed @penaddict.
See you there!