Is PyDev compatible with Helios?

I just downloaded Eclipse 3.6 and can't install PyDev.
- from update site (tried 3 times) I get this error:

An error occurred while collecting items to be installed
session context was:(profile=PlatformProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
No repository found containing: osgi.bundle,org.eclipse.jdt.core,3.6.0.v_A58
No repository found containing: osgi.bundle,org.eclipse.jdt.core.manipulation,1.3.0.v20100520-0800
No repository found containing: osgi.bundle,org.eclipse.jdt.debug,3.6.0.v20100526
No repository found containing: osgi.bundle,org.eclipse.jdt.launching,3.5.100.v20100526
No repository found containing: osgi.bundle,org.eclipse.jdt.ui,3.6.0.v20100602-1600
No repository found containing: osgi.bundle,org.junit,3.8.2.v3_8_2_v20100427-1100

- putting PyDev zip bungle in Eclipse dropins has no effect

Problem resolved with disabling "Contact all update sites…" in Install software dialog

I can't import an already existing python (App Engine) project into eclipse via PyDev. I get no PyDev option in the import menu. using Helios.
It's a bug ?

Not really, you should use file > import  > existing projects into workspace (if it's a project that already has the .project)

Otherwise, you should create a new project and just set it to point to the existing sources (without creating a src folder as you already have it) and later configure the pythonpath for that project as described at: http://pydev.org/manual_101_project_conf2.html (if you believe it could be better, please add a feature request - maybe a create from existing sources?).

Cheers,

Fabio