hmmm ... yeah then disable it. It's not like it's adding any security to the server itself or so (as long as you don't use a addon like ClamFS - which isn't used for a webserver in the most setups ...).
Yeah ... too many interesting technologies and too less time for a single man to try them all out. Using Varnish and implementing some ESI magic with it is also on my agenda. :-D
Just wanted to look what a Litespeed license itself is costing. But they aren't even showing prices on their website - normally that's a bad sign meaning it's really expensive. :P