Martin's distributes Herend ware in the U.S. Their site displays a large range of wares; lists news, events and retailers; and gives details about the Herend Guild, a collectors society offering limited editions, special figurines, etc.
http://www.herendusa.com/   

Portal site for the Manufactory; Porcelanium (visitor centre); Museum and Herend herald (magazine).
See porcelain being made in the Visitors' Centre "mini-factory", then buy at their shop. Guided tours include a multi-language film (also available online), with open-air entertainment in the Porcelanium square.
The Manufactory lists information and activities, plus shops and retailers worldwide. Products pages display handmade porcelain, patterns and brief artists’ details. It also issues the quarterly Herend herald, a magazine about the company, its activities and products. It is available online or by subscription, with back issues online.
The Muzeum Herend, in the original Herend factory, has over 10,000 items plus many archival records. Read about the displays, or take a virtual tour (includes some images); guided tours are by arrangement.
http://www.herend.com/    In English, German & Hungarian.

"The most comprehensive collection of 18th- and 19th-century Russian imperial art outside of Russia." See highlights of the porcelain collection online (especially Sevres and Russian Imperial ware); Museum visitors must book in advance.
http://www.hillwoodmuseum.org/   

Kronberger House, part of the Museum, has the world's largest assembly of Hoescht porcelain. Check exhibition listings for brief details of early Hoescht pieces; the famous Bechtold collection; and the former Hoescht AG collection.
http://www.historisches-museum.frankfurt.de/    In English & German.

Study arts and crafts, including china painting, with local and guest artists; or inquire about supplies and kilns. President: Naruvorn Panyarachun.
http://www.hobbyhousethailand.com/    In English & Thai.

Hobbyceram International School of decorative arts is a large school with branches in Italy and overseas. They also make kilns and sell supplies including books and Sonie Ames studies; brushes; whiteware; and paints (with lead-free Schjerning, overglaze watercolours and pencils).
http://www.hobbyceram.com/    In English & Italian.

The Gallery sells handmade glass jewelry, while their studio teaches jewellery making, and glass and porcelain painting (some pieces shown online). Their painters' group also meets for regular paint-ins.
http://www.hochart.pl/    In Polish.

This "second oldest" porcelain manufacturer in Germany re-opened in 1971. Many items are made by hand; all are hand painted. Products include giftware, figurines, reproductions and tableware; read how high firing makes wares "dishwasher safe." Join the collectors' club, or visit in person factory sales; exhibitions; and guided tours. Don't miss the outstanding Hoechster collection at the nearby museum.
http://www.hoechster-porzellan.de/    In German.

The Hofburg, winter residence of the Habsburgs, today holds three museums: the Imperial Apartments, the Sisi Museum and the Imperial Silver Collection. The latter is the world's largest exhibition of imperial household items, ranging from table silver, centrepieces and fine porcelain to linen and cooking utensils. View the tour information under "Things to know" for a brief description of some of its porcelain treasures by Meissen, Minton, Sevres, etc.
The Spanish Riding School, famous for its Lipizzaner stallions, is also within the Hofburg complex.
http://www.hofburg-wien.at/    In various languages.

Useful articles, including photo tips, compiled by a "jewelry artist".
http://www.home-jewelry-business-success-tips.com/