Map code for sharing! And more!
What about a code for the maps?
Ex.: Add at the top of the creator screen a bar with all tools, but also some new options. Like where you can get the Map Code! With this code you can share your map with other Lineriders. So if they want the same map, they can just copy the code. Way more easier than replicating the whole map.. Wich costs a lot of time.
It's not very hard when you've done it many times before, and already know exactly what to do, but I see how it would be a lot easier for new(ish) line rider users to do. What you've suggested sounds exactly like what free rider have done - which works fairly well.
I'm sure they've already considered this idea, and many others, so let's just see what happens in the next game versions!
Maybe background colors are nice too 
So you can choose ur own color, maybe even upload a picture! This will give your map a nice pimp and gives it a theme. (Picture can also be standart theme options, like a snow theme, mountain theme etc..)
Colors have alraedy been considered a lot - look at the TechDawg's advanture video. I'm not too sure if/how custom images would work. Especially if you combine that idea with sending tracks to friends with a copy+pasting random letters thing.
Standard pictures are not a good idea, because then everyone's tracks would end up scened in the same way...that would get very boring to watch.
Some objects would be nice too, like trees. You can place these things into your map for improving it's look.
Same as above. We don't want all the tracks looking the same.
And what about costumizing your own linerider? Like outfits you can choose out.
I know there is some sort of plan to let you choose your own rider (e.g. the female line rider at the bottom of this page) but I don't know exactly how it will work yet. I guess we'll find out in a few months! 
And what about a timer? With this, you can see how long your ride is.
It's not really needed, but I guess it could be interesting... Maybe.
Anyways,, I'm new and I dont know what's already suggested. So please dont be mad if these things are already suggested
Don't worry, it's always good to see new people joining the forum with a positive attitude 
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When is the next version coming out? A Beta 3 would be nice but doubt they will revert to flash. Anyway, they should make a Silverlight v2.0 with all those bugs fixed.
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It Is Dumb To Lay Down In Front Of A Moving Lawnmower. But Is It Smart To Lay In Back?
What about a code for the maps?
Ex.: Add at the top of the creator screen a bar with all tools, but also some new options. Like where you can get the Map Code! With this code you can share your map with other Lineriders. So if they want the same map, they can just copy the code. Way more easier than replicating the whole map.. Wich costs a lot of time.
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So you can choose ur own color, maybe even upload a picture! This will give your map a nice pimp and gives it a theme. (Picture can also be standart theme options, like a snow theme, mountain theme etc..)
Maybe background colors are nice too
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Some objects would be nice too, like trees. You can place these things into your map for improving it's look.
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And what about costumizing your own linerider? Like outfits you can choose out.
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And what about a timer? With this, you can see how long your ride is.
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Anyways,, I'm new and I dont know what's already suggested. So please dont be mad if these things are already suggested
-Fidel