Sygate Free PFW

I've been using the free Sygate PFW in combination w/ a Linksys
router/switch since just before it was discontinued. I've been happy
with it; the outgoing application control is fast and doesn't seem to
screw up the normal execution of any other applications -- a rare
find.

However, since the product is no longer updated, I wonder if it is
still a valid solution since any recently discovered flaws or security
holes won't be fixed. Opinions? Is it a good idea to just switch to
the windows XP SP2 firewall? Another 3rd party PFW? Or can I continue
to use Sygate?

Thanks
.