I recently started a new job, and the default pen in the office supply cabinet is a Pilot G2 07. I haven't used one in quite a while, and I forgot how nice they are. Start up immediately, nice dark line, no blobs of goop on the lines. No wonder they are a huge seller.
I also broke down and ordered three pencils from Jetpens, a Pentel Kerry, a Uniball Kuru Toga, and a Pentel Wing Grip. I've used the Uniball Kuru, and it's really neat. The grip is clear, and you can see the lead rotating around, which is somewhat entertaining to watch. The Pilot Kerry is a nice, professional looking pencil, but I haven't broken it out yet. The Pentel Wing Grip is entertaining to look at, but I have't spent much time writing with it yet.
(4/27/09-Corrected mention of the Pilot Kerry to a Pentel Kerry. Oops)