Every valid character on the HB:

! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ ¡ ¢ £ € ¥ ¦ § ¨ © ª « ¬ ­ ® ¯ ° ± ² ³ ´ µ ¶ · ¸ ¹ º » Œ œ Ÿ ¿ À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß à á â ã ä å æ ç è é ê ë ì í î ï ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ Œ œ Š š Ÿ Ž ž ƒˆ˜ – —‘ ’ ‚“ ” „† ‡ •…‰ ‹ ›€™

thanks [vincevincevince]

[Aug 25 2002, last modified Oct 23 2010]

911 Power Boost (+9, -6)
Annotated Engine Map Under Hood (+11, -1)
Australian Inland Sea II (+9, -1)
Auto Space Sharing Bed (+3, -1)
Autophagic Heavy-Pykrete Starship (+8, -3)
Baker's Resources (+5, -2)
Beanbag Carriage (+2, -3)
Blood Glucose Indicator Tattoo (+23, -1)
Canal Container Trains (+5, -5)
Cat Evading Feed Bowl (+18, -2)
Cosmic Background Refrigeration (+52, -6)
Decibel Dosimeter/Headphone Cutout (+6, -2)
Disaster coffee table (+9)
Distributed Security Cam Monitoring Service (+15, -4)
Fridge extender (+3, -1)
Fridgeridoo (+7, -1)
Great Pykrete Pyramid of Ellesmere (+15, -1)
Grid-interactive co-generating hybrid vehicles (+5, -1)
Hairy Savonius Topper (+8, -1)
Halfbaked Instructables (+4, -2)
Hawaiian Launch Track (+2, -4)
HB SF short story anthology (+5, -2)
High Altitude Carbon Capture and Storage (+3)
LaGrange Golf (+13, -1)
Lawn Bed (+9, -3)
Link added (-2)
Non-stop underground (pneumatic version) (+1, -1)
Nuke Cumbre Vieja (+11, -5)
Other: Energy: Hydrogen and Other:Energy:Storage (+3, -2)
PC Vinyl Burner (+29, -3)
Personalized transgenic bacon (+4)
Programmable Plaques For Putting On Pedestals (+4, -1)
RealJesus(tm) Communion (+1, -3)
Round the corner mirror (-2)
Searchable Pockets (+2, -1)
SMS chat rooms & mailing lists (-1)
Solar/ Fuel Cell H2/He Airship (+6, -3)
Solar Thermal Photon Drive (+2, -2)
SpeakOver Music (+2, -1)
Speed Limiter for Skates/boards/bikes/karts (-3)
Stealth Gnomes (+9, -3)
Storage & Encoding Independent Audio Player (+1, -1)
Supercaloric fractal heuristic expert A.I. toasters (+15)
Surface mount pick-and-place pen (+4)
Tethered Blimps for Hydrogen Storage (+3, -6)
Tidally Pumped Moist Air Duct (+4)
Titanic Re-Creation Euthanasia Cruise (+36, -7)
Trailing Solar Chimney Powered Blimp (+1)
UN voting power: population x democracy (+1, -13)
Unified Bookmarks File (0)
Vertical Slingshot Launch Hang Gliders (+18, -1)

random, halfbakery