Whoops... forgot that it's a house rule of mine. Anyways, focused expertise is not a feat bonus as well. Untyped bonuses stack with other bonuses (feat, power, item, etc)
[sblock=feat from compendium]
Focused Expertise
Heroic Tier
Benefit: Choose a weapon that you can wield as an implement. You gain a +1 bonus to attack rolls with any implement or weapon power you use through that weapon. The bonus increases to +2 at 15th level and +3 at 25th level.
Special: You can take this feat more than once. Each time you take this feat, choose a different weapon that you can wield as an implement. This bonus is not cumulative with the one provided by Implement Expertise or Weapon Expertise.[/sblock]