Check out this pen...
http://www.cultpens.com/acatalog/Pilot_Frixion_Erasable_Rollerball.html It really is the hottest, most awesome pen in the Universe. I love stationery in a way that should have me banned from W.H.Smith... Lest I rip off my clothes and roll about in their ballpoints, ring binders and unused, virgin, erasers. I know when a pen is sexy and this pen is begging for it.
The Pilot Frixion Erasable Rollerball (I've only ever used black ones) writes like a dream, making even my left-handed scrawl look good. It erases in seconds, using a built-in rubber and leaves no mess, as it somehow uses HEAT from the friction. Cool. I mean, HOT.
Although that does mean that prolonged exposure to high heat could make your scribblings disappear (but we'll ignore that).
Unimag and I are sexually compatible enough that we both own a couple of Frixions and have even bought them for each other. We feel the same about them... It would be a problem if we didn't.
Treat yourself to the black one and if you agree with me, send me the set of eight different coloured ones as a thank-you for drawing your attention to them.