Thanks for reporting the issue.
We had an unexpected number of new users, which in turn is over loading our servers. We are working non-stop to move to better servers and optimize Tweepi's code, and insure that Tweepi stays the fastest, most reliable service out there.
During the next few days, Tweepi should be up and running most of the time, but we might be having some short downtime periods until the upgrades are over.
If you have any feature requests or questions, please do not hesitate to email back.
Thank you for your understanding.