There are signs you can use to identify jumps if you're not familiar with them.
Axels - forward take-off
Lutz - toe-assisted jump. After the axels they're the easiest to identify. Usually done from a looong backward glide, the skater leaning on an outside edge, and launched with the other toe-pick in the corner of the rink. You can see them coming a mile off especially by the women (the younger ones tend to lean forward and raise their back free leg very high before it strikes the ice). Occasionally preceded by footwork.
Flip - toe assisted jump. Usually entered from a straight forward glide, with the free foot held up in front. Just before the jump, the
free leg will tap the ice, pushing the skater into a turn (so they're backwards), the other foot picks the ice launching into the jump.
http://www.youtube.com/watch?v=lPzjUwuGJLQ
Loop - edge jump. Curved entry, skaters cross one leg in front of the other just before jumping, to form a 'loop' - well it's how I think of them!
Salchow - edge jump. Usually performed in circular pattern of steps.
Toeloop - toe assisted jump. Mostly performed as 2nd or 3rd part pf a jump combination. Otherwise you can identify them by their straight line approach into three turns into the jump. I got this off Wikipedia which may help distinguish them from flips.
"Spectators sometimes confuse the toe loop and flip jump, since they are both toe-assisted jumps with similar straight-line entry patterns. One way to distinguish them is that in the toe loop, the pick is outside the curve of the jump, while in the flip, the pick is inside the curve. Many skaters also "chop" the toe pick more on the flip than the toe-loop."
I started writing about the position of shoulders and arms, but it got too complicated for me. Maybe others can give better tips on identifying jumps than me.
Back flips are definitely not allowed and you can be heavily penalised for doing one (no idea by how much though in the COP system). I think it was in the Nagano Olympics, Surya Bonaly found herself, after the short program, shut out of the medals, so she decided in the long, to hell with it, and did a fantastic one legged back flip to the delight of the audience.
Well done to Lyscaek for a great, clean skate. I was routing for Joubert to begin with, but he's just too arrogant to like! I think all his talk about the competition being just "practice" for the Olympics puts down Lycaek's achievement and devalues the Worlds for what it is. We could all see how gutted Joubert was after he finished - why can't he just admit how much he wanted to win, but it went wrong, and give credit where credit's due??