Although it does make me lead into a second query:
Using Warded Touch I wonder if I could cast Lay on Hands whlist attacking the creature in question with my sword...
I suspect I would be allowed by my GM as long as I took 2 actions and rolled against the AC rather than the TAC; less efficient overall but it does lend itself a more thematic visual rather than playfully slapping a skeleton's behind with the flat of my sword...
The errata'd text of warded touch reads
You cast lay on hands in a simple motion without any complicated gestures. The Somatic Spellcasting action for lay on hands loses the manipulate trait, and you can cast it and deliver your touch with a hand holding a weapon or shield.
Since it says "with a hand holding a weapon" rather than "with a held weapon," I'm afraid the visual's not going to work by RAW.
I wouldn't be surprised if there's a feat for this later, but if your GM wants to houserule it (after the playtest, presumably) they should consider the impact of reach weapons.