Anyone know of any good project management apps written to work on or with Google apps?

[Jason]

We traditionally use a combination MS Project, MS Office and custom
Lotus Domino applications for project management and tracking as well
as content management for all software development related artifacts.
I have read a few good reviews of Basecamp (http://basecamphq.com/)
and may demo it. However, I would prefer something more aligned with
Google app development as that is where we are spending our time at
the moment. Let me know if anyone has any suggestions.

Thanks,

Jason

[rpm]

Sounds like we need to do some project managing tool inventing
(again). Maybe we should grab a beer some evening...rpm