As a special treat (and since it's the weekend), 
I'll even provide links today.

[last 24 hours, give or take]

Anime Gambit
http://www.anime-gambit.com/

Nichibei Anime Club
http://www.nichibeianime.com/index.shtml

Anime iLand (Artworks Osaka)
http://www2u.biglobe.ne.jp/%7Eiland/

[from the past 2-3 days]

Hobby Shop K
http://hobbyshopk.com/

Anime-Cel
http://www.anime-cel.com/

Anime World Star (Japan-only)
http://www.anime-world-star.com/

[and if you want to see if Bonbee sent your order]

Bonbee
http://plaza11.mbn.or.jp/~bonbee/

I don't know if they are part of the cels.org 
database at the moment (Yann?) but since they're 
both up and running now, I'll also supply the 
competing Noonchester sites:

Anime Ed
http://www.animeed.com/

Ed Noonchester Artwork
http://www.ednoonchester-artwork.com/

Finally, even though it's not part of cels.org, 
here's one more site which was updated recently:

Anime Cellar
http://www.animecellar.com/animecels/amimecels.htm
l


Sigh... no more money to spend...