i've got a 366 mhz SE clam that i overclocked to 450mhz (576mb ram and 40gb hdd). i have 10.4.3 on it right now and its a little sluggish sometimes, but for every day stuff (word, safari, occasional fireworks mx 2004) its alright....the 800x600 resolution is the worst part about it, but overall, i'm much happier with os x than i was with 9.2.2