An internal company letter from Sprint letter that discusses its launch plans for the highly-anticipated Palm Pre has been leaked online.

The document labeled “Sprint confidential information for internal use only,” came with a warning that any “improper sharing” of the document would be investigated, and could result in “termination. The document was first released online by Engadget who published the 21-page document in its entirety on Sunday.

The leaked document notes the dates for its phone release which include: a Hollywood promotional event on June 3, a New York executive breakfast on June 5, and invitation-only VIP events at 10 flagship stores also on June 5. For the public, we will need to wait until the official June 6 launch.

In the document, Palm Pre showed a list that compared Sprint to rival articles. See the chart below:

See the chart below for the Sprint pricing plans: