What kind of material can I use to hold the balloons for an air-inflated balloon arch?
gp32x (or gp2x) is probably your best bet. its open source, it can run linux, it can run a full versions of web browsers, there are games, it supports media platforms, it can run video, it cannot run skype, but it can run SIP which is open source.they are around $145 shipped. Its definetly not as smooth looking as the mylo or psp, but its pretty much the best thing you can get in that price range. if you up that to $500, you open a whole new set of doors.
Yes, that is a fire hydrant, and no, you may not park there. They do not need yellow or red curbs or signs, You are supposed to have common sense and know you cannot park with fifteen feet of a hydrant. I saw a fire in Indianapolis once, and a guy had parked a brand new Cadillac next to a hydrant. After the fire, the car had bootprints all over it, and hoses had been drug through the car. On top of all that, he got a ticket.