I currently have 3 m-audio cards I am attempting to sync on my DAW. I have 2 1010's (External Balanced Rackmount units, NOT 1010lt's) and an audiophile 2496. I have been successful (in a buggy way) to get 1 1010 and the 2496 working. When i setup my 2 1010's no dice. Erratic, buggy unsynced audio. There have been many many complaints about this setup to maudio.
I did notice that new drivers came out in May, (I had given up hope of correct drivers....) I will be testing my rig tonight.
I will report back on what i find.
About using multiple 1010lt's Ive never used them, but Im fairly sure that the synchronization method and the driver revision are the same for both the 1010 external and the 1010lt.