The Nintendo 3DS utilizes a similar title-based organization as seen in the Wii and DSi platforms. The same update server is being used as was with the DSi, however a new common key has been introduced.
The organization of Title IDs has not been documented fully yet.
Here are some confirmed Title IDs (from the first update):
00040010-00024000 - USA Promotional video v0 00040010-00025000 - EUR Promotional video v0 000400DB-00016102 000400DB-00017102 00040130-00001C02 - Firmware 02_1C v1040 00040130-00002402 - Firmware 02_24 v1024 00040130-00002D02 - Firmware 02_2D v1024 00040130-00002E02 - Firmware 02_2E v1024 00040130-00003402 - Firmware 02_34 v1024 0004013000008002 v0, v1028 00040138-00000002 - Home Menu v1472 0004013800000102 v432, v1489 00040010-00020400 Nintendo 3DS Camera (Available on NUS but not in SOAP response) 00040010-00020500 Nintendo 3DS Sound (Available on NUS but not in SOAP response) 0004800F484E4841 v0, v1026