If you're that worried about it, send the rear shock to Push Industries for a rebuild. To see if it needs rebuilt, remove shock from frame, remove coil spring from shock, push/pull shock to see if dampening is still working. If not, rebuild. If so, reassemble and ride the snot out of it.
Basic coil spring forks are cheap. If yours don't dampen then replacements are usually available on ebay cheaper than the forks can be rebuilt. However, rebuilding forks isn't that expensive unless you have to replace stanchions/lowers.
You can get dampening rebuild kits for just about every fork ever made. Google is your friend for price comparisons.