If I can summon Task Spirits (p 98, Street Magic) they have the optional power of Skill. There doesn't seem to be a restriction on having to know the skill you're giving the Task Spirit (like there is if you give a Spirit of Man an Innate Spell.) So if my Possession based mage summons up a force 6 Task Spirit, gives it a couple of skills that the summoner doesn't have, then has the spirit possess him, shouldn't that give the character a couple of free level 6 skills to throw around?
Also, there doesn't seem to be any restriction on the skill level listed. Does a force 12 Task spirit have a skill level of 12?
Limited to only Technical (not sure about the hacking type skills though, what with the no AR clause for spirits) and Physical skills, I know, but that does make for a pretty good summonable medic. Just follow it up with a Spirit of Man with Heal.