Not sure if these have been suggested but.....
1.) The quality and accuracy (not to mention convenience) of second life models would be so much better with the option to mirror prims on a specified axis.
2.) Please, I beg you, get a music compression license so we can have more than 10 second wav files. Some of us are composers =] Stringing together wav files is never seemless, and is...icky.
3.) Just a thought for when SL is down or our internet connections are bogus, we could use an offline SL program that we could enter while not online and still build stuff, then import it when we get our connections back. Sort of like the construct program in the Matrix?
Thanks for the consideration!