jennywren wrote:I'm waiting for them to come back where I will offer the black mugs fro printowners. I also don't think that I can get the black look the same on 80 mugs it. I'm sure the shades will be black to blue

The black mugs with the white printable panel sold by BMS are single-panel mugs (the printable panel is about 4" wide by 3.75" high). They're good mugs but not for a wrap print because you can only print on the one side where the panel is.
The old-style of black mugs with a white "wrap" panel are still sold by Listawood: [url="
http://www.listawoodtradesupplies.co.uk ... roduct=581]
http://www.listawoodtradesupplies.co.uk ... roduct=581[/url]
The key difference other than the size of the printable areas is that the new ones (sold by BMS) are dishwasher-safe while the old ones (sold by Listawood) are not. I had some of the old ones once (when Subli-Nation sold them) and, to be honest, the printable panel was all over the place and trying to line up the print was an exercise in frustration (this may not be the case with the ones from Listawood). The newer ones sold by BMS are much more consistent and of a better quality.
However, if you're doing a logo on a black background, you will notice that the black you get from printing onto the white panel will not be the same as the deep gloss black of the mug - and, even if you feel it's satisfactory, you will see the "edge" of the panel and it'll be obvious that you've printed on a panel.
Also, the white panel that you're printing on reflects colour differently depending on your light source. If you're trying to print a greyscale, you'll notice a red tone under household lights but a blue tone under daylight. You can't tweak your print to accommodate all different light sources. I haven't done enough greyscale printing on the BMS ones to see how bad it is on them, but the previous "wrap panel" ones left a lot to be desired and that's why I stress the difficulties on my website in the product description to avoid customer disappointment.
Personally, I only recommend the black "panel" mugs for full colour photographs that cover the full panel rather than for logos/designs that require a black background. With a photo, they look great because it's not obvious that you've printed "on a panel" and, with a good colourful picture, the colour tone under different light sources is virtually unnoticeable.
I'd recommend you do some samples for yourself to see what result you'll get before committing to a large order. BMS sells them in quantities as low as 12, which should give you an understanding of whether they're suitable.