30 mins @ 750mhz with "Bounce Evolution", DrNokSNES, Youtube Page, Conky, all running live in the back ground. Slightly laggy but running better than I thought. Time for 800mhz.
the only thing with pushing it right too the max ,as close as you can get without it crashing etc , is if you use your n900 heavily id expect there to be some higher wear on the components through heat etc
if you dont push your n900 to the max for every minute of everyday the effect of overclocking will be less noticeable via the lifespan of the handset its only in extreme cases of pushing it to the max all day which could result in things getting worn out quickly
of course it all depends on how efficent the omap3 is under high loads and how hot it gets etc i guess we are the guinea pigs on this one :-)
i would expect the o/s to be optified a bit more in pr1.2 specially as it is such a new o/s , so hopefully this will help cpu consumption as i notice the odd spike when watching conky and cpu useage