Well, Freight Micro comes to mind. Designed for use below 9 points. More info available on the designer's own site.

Franklin Gothic works well for labels too - it's quite legible in the condensed weights. I used it on food labels for ingreds and such as small as 6 pts.

What about that Knock out font series B.
http://www.typography.com/fonts/font_styles.php?productLineID=100013&var...

Bell Centennial is great for the fine print too.

La formica is a typeface by German designer Volker Heim, made for setting very small yet readable text at 5pt and below.

Use a medium (or demi) style with a pronounced x-height. Preferably a typeface that withstands some condensing (around 90%) — that way you will be able to use a slightly larger typesize, improving legibility.

Although sans typefaces are considered to be more legible, this is not supported by research, so feel free to use a nice serif… (maybe one by my compatriot Gerard Unger? http://www.gerardunger.com/fontstore/store-capitolium.html ).

___
Bert Vanderveen BNO

Have a look at Sumner Stone's beautiful Cycles:
"There are versions for 5, 7, 9, 11, 18, 24, and 36 point."

It seems to me that Cycles and Arepo might be all a wine label designer ever needs!

Wow, thanks guys this is very exciting. Who ever said don’t sweat the small stuff didn’t do back labels!

I would like to have a variety of fonts that I can use for small print

The Freight Micro seems so unique with it’s serifs. Franklin Gothic is good and I use it but I = forget about it thanks for reminding me, I haven’t seen it small but it might be limited in it's usefulness. I am still wondering what people think of that knock out series B. Bell centennial looks like a good font might be really useful. Lafomica.de has an ant running around on the page, a note that says just married and I have no clue where the fonts are. Capitolium is great. So much to add to my wish list.

I see a real use for a design reference book showing small type layouts. Cycles is nice but I wonder if the Arepo would hold up in 8 points.

Thanks!

Also I believe that Amplitude is very good at small sizes, and has a kazillion weights and widths.

No, Arepo is _not_ for small sizes; it's a display face...it pairs with Cycles, which has size specific cuts.

Don't forget Minuscule!
http://typographica.org/2008/typeface-reviews/minuscule/

hhp

And this fontlist by Nick Sherman http://www.fontshop.com/fontlist/applications/small_text/