iPhone verson = $.99 - iPad version = $2.99 : Mushroom Age Mushroom Age HD Treasure Seekers: Visions of Gold Treasure Seekers: Visions of Gold HD Romance of Rome Romance of Rome HD Jack of All Tribes Deluxe Jack of All Tribes HD Deluxe Fix-it-up: Kate's Adventure Fix-it-up: Kate's Adventure HD Virtual City Virtual City HD Mushroom Age has already on sale, others will follow.
Jack Of All Tribes HD Deluxe and Virtual City HD are definitely worth it if they're going for 99c each. I have both and probably paid about $6-7 for them but it was well worth it.