Well, the title basically sums it up, but here's more detail:
The problem with my iPod is: I just jailbroke my iPod Touch 1st Generation 8GB using Blackra1n, but I updated it from 1.1.5>3.1.2 then jailbroke. I install Cydia, respring, then open. 10 seconds (give or take a few seconds) later, it's in the "Loading Data" or whatever screen then it crashes. Tried it a bunch of times until I finally posted here. Any help is appreciated!
Further detail:
iPod Touch 1st Gen 8GB
Firmware: 3.1.2
Jailbreak Tool: Blackra1n
*For the record, Cydia never opened on this iPod, but worked on my 2nd Gen.