Looks like that was it. Zombies spawn, health depletes, and I was able to move east a bit and unassign myself as an admin and was able to break blocks.
One more question I have: My previous vanilla server ran bukkit and dynmap. Does tekkit support this? I downloaded a 1.4.7 edition of bukkitforge and put it into coremods but when attempting to run the launch.bat, the sever never launches. (Tons of "[iNFO] STDERR" messages, ending in "...9 more"). Is this a confliction with one of the dozens of mods tekkit uses? No plugins folder was even created yet. Simply removing the bukkitforge jar file from the coremods directory reverts back to a fully working server.
Edit: I read that BukkitForge is not yet supported. That said, I downloaded Forge 6.6.0, installed it in the mod directory (without issue), and put the dynmap files in the newly created plugins directory. The plugin is not detected at server startup.