SD200 and SD300 have the digic ii processor, I wonder if their prices will be coming down soon with the intro of the beefier MPs of the SD400 & SD500.
I have the SD200, it's not perfect but it is a nice little camera. Have sold & will be selling my A85 & 95. Take very nice pictures but heavy, and kind of slow in taking photos.
Re: the A510, it really souds nice, uses on 2 AAs insteand of 4 and SD card instead of CF. Bought my dad an A75 for Christmas, wish the A510 was available then.