I use TimeSheet (http://www.jsankey.com/software/timesheet/timesheet.htm) to keep track of my working hours. As in many IT companies everything I work on has to be accounted to some work package (for lots of different customers, for internal stuff, warranty work, whatever). Whenever I switch targets I simply click on another workpackage in TimeSheet and it'll keep track of it for me.

(There's apparently a GPE-timesheet native Maemo application too, but I haven't checked it out. In any case I don't want to lose years of data that I have in my current app.)

To use GVM can be a little slow, at least on the N800, but that's just the initial startup. It's also possible to make shortcuts and start individual applications directly (even installing icons in Maemo to do so). This is explained in another (old) thread.

Pandora: It's designed as a gaming device, but if you ignore the gaming (as do I) then it's basically a device based on the same OMAP3 chipset as the N900, but designed like a super-charged N800 (e.g. two full-size, accessible SD slots). http://www.open-pandora.org/

I don't know anything about Symbian emulators.