Encouraged by a previous query here, I finally managed to pick up and upgrade to Snow Leopard. Long story short: if you haven't done it, do it. I'm not seeing a big boost on Logos 4 Mac, but the Mac runs so much better overall, you will be glad you did. The only downside was some extra installation time due to the fact that the DVDs are 10.6.3 and there's a 10.6.4 update now as well. (That'll teach me not to wait so long to upgrade
.)