Can HAML and Liquid Templates Coexist?

So we're in the middle of converting all our rhtml to HAML (Love it,
simply beautiful) and I was wondering if Liquid Temples by the
Leetsoft/Shopify guys can be used at the same time or is it one or the
other?

I may be completely mistaken regarding Liquid Templates in assuming it
is a markup language like HAML is.

But down the road we may have a need to allow users to customize
certain parts of their account (header/sidebar/footer) and the first
thing that came to my mind was liquid templates. So I'm wondering if
all our work now with converting things to HAML will be a waste if we
end up needing to use Liquid down the road?

Anyone else have any experience with this? Thanks in advance.

Also, I was thinking perhaps you could duplicate the functionality of
Liquid Templates while still using Haml. Anyone know how much work
that might be?