I attended the DTP PMC telecon today.
We had a productive meeting and discussed several issues of mutual interest.
John Graham will distribute minutes. Here is my summary:
1. Migration of WTP Data Tools to DTP
DTP has published a draft plan. 
They plan to have a 0.n release in March for EclipseCon 2006, followed
by an API-promoting 1.0 release on the Eclipse 3.2 train in June. If this
plan gets committed, then we should start picking up DTP milestones in
early 2006 and be fully migrated for the WTP 1.5 release, i.e. we would
not ship the WTP Data tools in WTP 1.5.
2. JSR 220 Proposals
We agreed that since WTP and DTP are
the likely consumers of the Oracle and Versant Technology projects, that
we should work with these projects to help them adopt common components
in any areas of overlap so we can integrate them in the future. We believe
that these projects will address complementary aspects of JSR 220, but
we need these to integrate to provide a common solution. We agreed that
we do not want to carry two incompatible ORM stacks into the future.
3. Formal Communication Channels
We agreed that we should establish a
formal communication mechanism, possibly by membership in each other's
PMCs or Architecture and Requirements groups.
4. Connection Framework
DTP has a connection framework which
might be useful in WTP server tools. DTP will check in this code to CVS
soon and would like us to assess it.
John Graham and Karl Reti will be at
EclipseWorld. We should meet there to discuss these issues further.