Reduce ajax requests to one-line with jquery-ahm
jqueryahm.com
jqueryahm.com
Granted it's quite neat, but it seems like a bad idea. I think too many libraries recently are focusing on length of code to the detriment of good principles and clarity.
I'd suggest going back and reviewing the concepts of "graceful degradation"; for large scale web applications where this doesn't really apply, you'll quickly find yourself wanting the code streamlined and in one place.