I use psreadline / conemu every day (it's been out quite a while). If you have GNU ctrl-R, up, escape underscore etc in your fingertips, you want it.

Windows users:

    Install-Package PSReadLine

Then add

    Import-Module PSReadLine

To whatever $profile is.

tonerdo: I don't really know .net very well, how would .net readline compare to psreadline?