Uses for Sculpt Spell, eh? Here're some spells it's good for:
Grease (40-foot cone, gets EVERYthing inside that area ... start rolling them saving throws, lol!).
Glitterdust (a 40-foot cone, or 20-foot burst, is better than it's inherent, small AoE by a long way).
Burial Blessing (DotF, Clr1, "Area: corpse touched" -- get an entire small GRAVEYARD with one 20-foot burst ...).
Castigate (DotF, Clr4; "Area: 10-foot emanation").
Knife Spray (DotF, Clr 2; "Area: Cone"; "Range: 25 feet + 5 feet / 2 levels"; a 20-foot burst version could prove useful in the right circumstances).
Slime Wave (DotF, an abusive Clr7, Drd7 spell; "Area: 15-foot-radius spread" ... CONE the sucker ...).
Cacohpnic Shield (MoF, Brd 6, Sor/Wiz 6; "Area: 10-foot radius emanation, centered on you" ... a 20-foot would be better, though it's defensive uses would be limited if one used a different AoE than burst ...).
Earthfast (MoF, Drd 2; "Area: one stone structure or rock formation, up to 25 cubic feet / level"; with a cone or burst, you might manage to get TWO, or even three, smallish structures (a pair of adjacent, low, 20-foot-diameter towers, maybe)).
Energy Transformation Field (MoF; Sor/Wiz 6; "Area: 40-foot radius spread"; strange as it may sound, you may want to sculpt it to a SMALLER area ... say, a 20-foot burst, to match the area of the Fireball you link to the Field ... heh! Also works for linking cones, to a cone-area Field, and so on).
Explosive Cascade (MoF, Sor/Wiz 4; "Area: one 5-foot square pr level, ll of which must be connected in one continuous path (s)"; as a cone or burst, this could be quite nasty ...).
Gedlee's Electric Loop (MoF, Sor/Wiz 2; "Area: 5-foot radius burst"; a cone or 20-foot burst is potentially very useful, esp due to the possible secondary effects of the spell).
Shatterfloor (MoF, Sor/Wiz 3; "Area: 15-foot radius spread"; a cone area, or slightly larger burst, could prove more tactically useful; since it destroys the top 6" of the floor surface within it's area ... cast sufficiently back, an entire 20 to 30 fot length of bridge could be obliterated, if it's deck were 6" or thinner. Shatterfloor is a personal favorite use for Sculpt Spell, in fact ...).
Wind Tunnel (MoF, Drd 5; "Area: One target/level"; very useful to cone or burst this sucker, if you're placing the area on a group of very small allies, and can fit more in the resultant area, than you coudl affect by the normal area ...).