In the newest catalog I got from them a few days ago, they included samples (enough to knit a tiny swatch) of Ambrosia and Panache! It was so nice to get to feel them... they both contain cashmere and are sooooo soft. I'll definitely be ordering some of this stuff.
(FYI - I actually got two copies of the catalog - one in my maiden name and one in my married name - and only one of them had the samples in it. I don't know whether the samples were included in random catalogs, or whether they sent them to people who have ordered previously.)
Several of their yarns have color cards available. You could always buy some of these if you want to feel (and see) the yarn.