Have had my HTC Desire S for a month and a bit - love it.
No, not a dual core like the Samsung Galaxy S2 - but does everything I need it to do and well - also smaller than an iCrap 4 and waaaaaaay smaller than a Galaxy which I prefer in a phone TBH.
Also feels very solid - has an aluminium unibody design - which is a fancy way of saying its made out of one piece of aluminium.