Eldritch Glaive from Dragon Magic allows a Warlock to modify his Eldritch Blast attack:
Your eldritch blast takes on physical substance, appearing similar to a glaive. As a full-round action, you can make a single melee touch attack as if wielding a reach weapon. If you hit, your target is affected as if struck by your eldritch blast (including any eldritch essence applied to the blast). Unlike hideous blow (Complete Arcane 134), you cannot combine your eldritch glaive with damage from a held weapon. Furthermore, until the start of your next turn, you also threaten nearby squares as if wielding a reach weapon, and you can make attacks of opportunity with your eldritch glaive. These are melee touch attacks. If your base attack bonus is +6 or higher, you can (as part of the full-round action) make as many attacks with your eldritch glaive as your base attack bonus allows. For example, a 12th-level warlock could attack twice, once with a base attack bonus of +6, and again with a base attack bonus of +1.
Complete Arcane p73 mentions that
Weapon Finesse: You can treat touch spells as light weapons and use your Dexterity modifier (instead of your Strength modifier) on your touch attack rolls with such spells.
And since Eldritch Blast is an (Sp) so I would assume that it works. Does it?
Are there any clarifications or additional official rules on this?