I keep putting this off, but here is a guide to the appearances of all variants of Mayday Parker just in case you guys are looking for more Mayday reading material or looking to collect more appearances of your favorite (and mine) web stunner.
MAYDAYS OF THE MULTIVERSE COMPREHENSIVE READING GUIDE
Earth-9997/Earth-1121 Maydays:
Marvels X #3-6 (Chronological First Appearance of Earth-9997 Mayday, comes in TPB format)
Earth X #1, 3, 6, 8-11, X (Comes in TPB and HC/Omnibus Format)
Universe X #0-12, X (Cameo by Earth-1121 Spider-Girl, comes in TPB and HC/Omnibus Format)
Universe X: Beasts (Comes in TPB and HC/Omnibus Format)
Universe X: Spidey (Comes in TPB and HC/Omnibus Format)
Paradise X: Heralds #1-3 (First full appearance of Earth-1121 Spider-Girl, comes in TPB and HC/Omnibus Format)
Paradise X #1-3, 6-8, 11, A (Comes in TPB and HC/Omnibus Format)
Paradise X: Ragnarok #2 (Comes in TPB and HC/Omnibus Format)
Uncanny Avengers vol.1 #14, 18-22 (last known full appearance of May "Venom" Parker, TPB format)
Other Realities:
What If? vol.2 #31, 86 (#31 is the first and only appearance of the "proto-Mayday", a nameless daughter born to Peter and MJ who inherited The Enigma Force and her fathers Spider-Powers and #86 has a younger version of May who was raised by Ben Reilly)
What If? House of M #1 (First and only appearance of Mayday's daughter, Anna. Also, first appearance of the more common redheaded variant of Mayday we see in alternate realities these days with this one being identical to MJ when she was her age)
Spider-Man: The Real Clone Saga #5-6 (MJ pregnant for most of series, May is only seen in the final issues, comes in TPB format)
Dark Ages #1-6 (comes in TPB format)
Spider-Man: The Lost Hunt (MJ is still pregnant as of #2 but I believe we will see May by series end so I am putting this in as a placeholder)