When developing apps in SharePoint that use the GAC for assemblies, you constantly need to be resetting/recycling IIS.
If like me you prefer to recycle your application pools rather than reset all of IIS you probably do this in a script all the time:
cscript c:\windows\system32\iisapp.vbs /a "MOSSAppPool" /r
Now that I have moved my dev environments to Server 2008 I am using IIS 7.0 and there is a new recycle script:
c:\windows\system32\inetsrv\appcmd.exe recycle APPPOOL "MOSSAppPool"