Depends on the blog host

One of the ones I like very much (it's also HUGE) is Livejournal. LJ's TOS says:

> Accounts created solely for commercial activity are permissible, as long as
> all such activity is contained to the journal itself. Such accounts cannot
> include click-through links or banner advertisements and cannot be used to
> spam.
> If you have goods or services to advertise, you may post entries about them
> in your journal. If you wish to post about your goods or services to a
> community journal, you should contact the maintainer first for permission,
> and limit your posting to a single community.

So, you could open up a journal there, talk about products and folksy things (like suggesting products for gifts for the holidays...(but you can't include a click-through to the product.) One of my friends who is an artist OCCASIONALLY puts up a cick-through to her website if she's talking about a new painting. But you couldn't do it on a daily basis or have 5-6 product links in one entry. You could put a link to an Avon press release, however.

This kind of rule varies between blogs, so check others.

A couple of blog tips for this kind of endeavor:

If you do this, then put your blog URL on a business card along with your email/phone number (kitchen magnet might be better, but that can be a pricey way of advertising) so that people can keep up with your new product announcements.

People love hints and tips, so you can write a little bit (and even link) to things like mood and color, aromatherapy (a nice perfume can make you feel better... the WRONG scent can irritate the dickens out of you all day long), and so forth.

If someone buys something for a gift, talk about that and who the gift was for. That sparks ideas for people. Also talk about cute presentation ideas and gift wraps.

Write about any upcoming parties and appearances, and whether they're going to be "small and intimate" (2-5 people) or whatever. Review them, too.

There's lots more, but those are the kinds of posts that I notice people being interested in (that, and political fights, but I don't think you'd want to do "and THIS is the perfume to wear to your anti-political demonstration march against Left-Handed Wrenchwatchers" type posts.)

Now that I look at it, Blogger may not have restrictions and they DO allow Google adsense clickthroughs. I *hate* their interface, but they may be the right place for you.