Tiki: Task and bug tracker that integrates with Basecamp

Tiki is a new, simple, web-based task and bug tracker that integrates with Basecamp.

Tiki is a web-based tool that enables individuals or groups to track bugs, tasks, to-do items, you name it. All information related to each task is stored in a ticket, and features include ticket routing that you control, handy auto-reminders, hearty search functions, and filters that enable you to see only what you want.

More on how Tiki plays nice with Basecamp:

Syncing
Automatic, direct-from-Basecamp updates with happen at midnight. Admins may initiate synchronization manually in "Basecamp Settings." First you update Tiki's Snapshot of your data, then you can import/update any projects. Additionally, you can import To-Do Lists on the fly, directly from Basecamp on the Create Ticket screen.

Time Logging
Each Ticket provides fields for submitting your time to Basecamp -- just enter in the # of hours and an optional description of what you did.

Completing a To-Do on Basecamp
Basecamp To-Dos are checked off when you Close a Ticket

Deleted To-Do List and Archived Projects
Deleted Basecamp To-Do lists and archived projects will still appear in your ticket list, but you won't be able to assign any new Tickets to them.

It's not 100% public yet but you can signup for an invitation code at tikiden.com.