The third official Oblivion plugin called the Wizard’s Tower has been released for PC users. This one is 17.6 MB and costs 1.89 just like the last one. Here is the info:

Located high in the Jeral Mountains of Cyrodiil away from prying eyes, this add-on makes the Wizard’s Tower, Frostcrag Spire, become available. Packed with numerous useful enhancements, this structure will prove invaluable to magic-oriented characters.

Features:

• A fully detailed tower for you to explore
• A breathtaking view of Cyrodiil from the highest point
  in the land
• Simple furnishings including a bed for leveling up
• An indoor botanical garden with over 130 specimens…
  including Oblivion-native herbs!
• Summon Atronach Familiars that obey your commands
• Instant teleports to every Mages Guild in Cyrodiil
• New Spell and Recharge vendor in the Imperial City
• Fully upgrade the furnishings in your lair to suit your needs
• Upgrade to a fully functional Enchanting and Spellmaking station with no need to join Mages Guild
• Upgrade to a laboratory that buffs your Alchemy skill

I’m still waiting for some shit that adds more stuff for melee characters.