Voadam
Legend
Pyrex said:OOC2: Somewhat bizarrely, my Mindblade isn't actually considered a magic weapon. Which means in all likelyhood I'm just wasting my time... :\
Actually, it is considered a magic weapon.

http://www.d20srd.org/srd/psionic/classes/soulknife.htm
The blade can be broken (it has hardness 10 and 10 hit points); however, a soulknife can simply create another on his next move action. The moment he relinquishes his grip on his blade, it dissipates (unless he intends to throw it; see below). A mind blade is considered a magic weapon for the purpose of overcoming damage reduction.
If I chose to use a monster with 3.0 DR or a modified version of 3.5 that used plusses (something I'm considering for certain all or nothing DR/magic monsters but won't decide until it actually comes up) I would consider it magical and not +1 until you get the 4th level power making it +1, but I would still rule it can still affect incorporeal.
http://www.d20srd.org/srd/specialAbilities.htm#incorporeality
Incorporeal creatures can be harmed only by other incorporeal creatures, by magic weapons, or by spells, spell-like effects, or supernatural effects. They are immune to all nonmagical attack forms. They are not burned by normal fires, affected by natural cold, or harmed by mundane acids.
Even when struck by magic or magic weapons, an incorporeal creature has a 50% chance to ignore any damage from a corporeal source—except for a force effect or damage dealt by a ghost touch weapon.
Note it does not say +1 weapons.
It could be argued that magical for purposes of DR means not magical for other purposes under RAW, but I am ruling it is sufficient to work on incorporeal creatures.
A soulblade being able to strike ghostly spirits seems thematically appropriate to me.