I've never found a place to download her music too. Only cd of hers are sold?

You all might find her cd's here http://www.rightstuf.com/main.shtml

This is where I get all well most of my anime stuff from & where I'm also a member of Got Anime?As member of course you will get a discount on you orders.Their sevice is very good.That is why I deal with them the most.

so that's where you can get it? I will check it out, you have to be a member over there?

The problem with some of these online anime stores is that they deal mostly in anime, and for some reason, seiyuu cd's are just not big sellers. You might want to try calling a store that specializes in j-pop or Japanese music. You might get better results.

You can also go here http://japanimation.com/beta/anime101/
I have bought from them as well.I don't think they have the artist that your lookn for.But they do have a very nice selection.And their sevice is quite good.

I am going to try HMV over at my end. they usually have all kinds of CDs.

I bought another Kikuko Inoue cd. 15 anniversary special. :P

How is it?

It's not bad. Mostly a collection of her old songs, along with a couple of new ones. I'd recommend buying it if you like her music. :)

Never herd the music but Peng says it's good so i'll check it out.

Hehehe, well well well... Jimmy has said it all. There's nothing much I can add to Inoue's profile.
Well for me, I adore Oneesan. I'm a super fan.
I first heard her voice from Ah! My Goddess OVA when I watched the DVD in June 2004. Then a few weeks after with a long stream of anime titles to watch, I watched Onegai Teacher, which is my #1 anime of all time, and hence I started liking Kikuko from there.

I constantly looked up her other roles in other anime titles and selected them and bought them carefully along with my other favorite seiyuu casts.
I have....
All of the Ah! My Goddess + CDs except for the Tokuten-ou+.
I've both the Onegai Teacher CD collections Seratula and Stokesia, which isn't really much related to Kikuko but she sings 2 of the songs.
I've still yet to acquire the drama CDs but I don't understand Japanese. :(

Additional roles which I'm sure we all know of here.
Mizuho from Please Teacher! (sorry that is too obvious yes)
Panther from SMJ, J to X.
Nadeshiko from Steel Angel Kurumi.
Uraha from Air
Rune Venus from El Hazard.
and many more..!

I've yet to collect her albums, me want very bad... must get the money first.