Tokyo-bound and looking for chocolate...
I'll say yes, based on the fact that their website (http://sweets-forest.com/index2.html ) has plenty of news for upcoming events.
Also, Miravile Impakt in Ginza does a four-dessert prix-fixe menu for Y2000: http://www.bento.com/rev/2747.html
And you might enjoy the main branch of Le Souffle (they have a stand in Sweets Forest).
Namja Town in Ikebukuro, run by the same company that runs Jiyugaoka Sweets Forest, also has a complex of several dessert shops, although I'm not sure if they're quite as upscale as the Jiyugaoka selection.
They're currently holding a major pudding-related event, until November 9 - one of their shops is selling puddings from around the country, to eat in or to take home. I had a good tofu pudding from Aoyama-dori Pudding Company, and a nice yuba pudding that was dotted with soybeans from someplace in Hokkaido. Also there for a limited time is their "cup ice museum", with hundreds of different ice creams and ice milks on sale. And of course the Gyoza Stadium is still going strong - stands from 11 different gyoza shops from around Japan.
Depending on where you're from, I'd skip Jiyugaoka Sweets Forest and go to some of the nicer shops--Laduree just opened in Ginza recently, Pierre Marcolini is also in Ginza, JP Hevin has a small cafe in the basement of Isetan in Shinjuku...those are all the ones I can remember off-hand, though I'm sure there are more.