We have a new guide up, this time an advanced guide on ship velocity from Farjung. Like most of EVE, it looks horribly complex until you actually understand it. Excerpt:

The list of things that affect your "cruising" speed, i.e. before you've turned an afterburner or microwarpdrive on is:

• Base speed of ship
• Overdrive Injector Systems, Nanofiber Internal Structures and/or Expanded Cargoholds equipped (low slot modules)
• Level of navigation skill (5% per level of skill)
• Level of racial ship skill where applicable, e.g. 5% per level of Racial Industrial skill on industrial ships
• Implants that effect velocity, e.g. Hardwiring - Eifyr and Co. 'Rogue' CY-1
• Bonuses from leadership skills and gang assist modules (I won't be going into too much detail on these as I'm not that familiar with them)

Cruising speed = (base speed of ship + increase/decrease from Overdrives/Nanofibers/Expanded Cargoholds) * (1 + navigation skill level * 0.05) * (1 + racial ship skill level * x [where applicable]) * (velocity implant(s)) * (gang skill/warfare module bonus(es))

It's a solid treatment on the subject, covers nearly everything that affects ship velocity, and can be found in our guide section.