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In v4 a mission (X-perimental) appears when you enter Omicron Lyrae. If you are already in OL upon updating to 4.00, or choose an OL-based game start, the mission won't appear until you exit and return to OL. This mission's rewards the Jump Drive which will greatly increase the rate at which the X Rebirth universe can be traversed. The Jumpdrive take 16 seconds to charge before jump and 10 minutes cooldown between jumps. Its cooldown can be reduced with Jump Coolant.
References: SonOfToastie post about JD, another post
In order to craft a Jump Drive the following items are needed over 3 stages:
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