GPS software/homebrew...best chioice?

[thearkman2009]

I am getting ready to buy the GPS unit for the PSP, but I want to know, what the best choice for the software would be?  I know of PSP Maps, but have not followed its development for quite some time.  I was told it works great.  I am looking for one that has live movement tracking, and an update rate thats pretty fast.  If it has turn by turn or something similar, that would be a bonus.  Anyone able to help me out?