Images are links to much bigger (and heavier) files. Please excuse the fact that I'm not a product photographer. I really should buy a light tent...
I've had this pen and have been writing with it for a week and a half or so, long enough to form some solid first impressions.

Appearance, Design & Finish. The pen has a sleek design, made of Makrolon and stainless steel (I presume). The materials have a brushed look that I find quite fetching, although it's not something I'd ordinarily go for. I found the pen to be quite light for its size - uncapped it is slightly longer than a Pelikan M200. I think it's a combination of shape and materials that add to my impression of a light pen.
I find it very comfortable to hold, and the much-discussed metal tabs the cap clicks onto (with a definite and secure action) don't bother me at all. Their placement puts them out of the way, and if you haven't seen the 2000 in person, you'll not believe how tiny they are after all the debate they've caused.
The clip is sprung. If you press on the blocky-shaped base of it, the end pivots out. It would be very easy to fit over a pocket this way, and I am confident it will grip well.
I don't post my caps, so can't comment effectively on that.
This is a pen that I can quite happily and comfortably write with for page after page.


(Size comparison with a Pelikan M205.)
Nib Design & Performance. The nib is semi-hooded behind stainless steel. It is 14ct gold, platinum plated, and very attractive.

This example is a medium, where most of my normal round-type points are fine or extra-fine. I went for it as my increasing use of stubs and italics is moving me towards broader nibs. It gives nice flow, tending towards the wetter end of the spectrum, and is really smooth, possibly the smoothest nib I own. Really pleasurable to write with.

Filling System. The pen is a piston-filler, not that you could tell by looking at it. Where the blind-cap butts onto the body, the combination of materials and finish leaves the join almost invisible.
Mine is a bit stiff, and if it doesn't loosen up over then next month or two I'll probably stick some silicon grease up in there. My only other gripe with it is that the ink-window is pretty much useless.
I bought the pen new, and there was a hint of blue in there. I coud also see some dried-ink-crud in the nib slit - I worried then that there was lots of manufacturing remains gathered in there that would require some help, but a good flushing sorted it all. I had read on here that Lamy fill-test these at the factory, so I wasn't bothered by the presence of ink, but I was surprised by just how much flushing I needed to do. Once that was done, it was fine, though.
Cost/Value. I bought this over the counter at The PEN Shop in Edinburgh, where you pay list for everything. A little pricier (GBP 95), but it was part of being on holiday and we all love the bricks 'n' mortar experience from time to time. Even with that, compared to UK prices it's a whole lot of pen for the money.
Conclusion. The Lamy 2000 took a long time to grow on me. I wasn't keen on the styling at first, and when I handled it I found it a little on the light side. I hope the piston loosens up a litte, but apart from that it really has grown on me, and I find the pen to be a cracker!