When following these instructions, I get the following error dialog

If you cannot read the message, it reads as follows
An error occurred while collecting
items to be installed session context
was:(profile=SDKProfile,
phase=org.eclipse.equinox.internal.p2.engine.phases.Collect,
operand=, action=). Unable to read
repository at
http://download.eclipse.org/tools/ajdt/36/update/plugins/org.aspectj.ajde_1.6.11.20110304135300.jar.
Read timed out
Has anyone else encountered this? And if so, is there a workaround?
EDIT
Well it appears that someone else has — link.
Well, as my edit indicates, the problem was due to connectivity issues.