Providers

Anny Way
Fixed-line MMSC allows sending of multimedia messages to the fixed network.
http://www.annyway.com/annyway/MMSC.84+M5d637b1e38d.0.html

Ericsson
A MMS solution includes all components and solutions that an operator needs to offer users a rich multimedia experience.
http://www.ericsson.com/mobilityworld/sub/open/technologies/mms_mm7/index.html

Motorola
Produces a multiple messaging types (SMS, EMS and MMS) in one platform.
http://www.motorola.com/content.jsp?globalObjectId=2039-4399

Now SMS
Produces a gateway which can be used both as a SMSC and MMSC.
http://www.nowsms.com/

OKSIJEN
EasyMessenger provides variety of other services when integrated with EasyBridge (Oksijen's mobile VAS platform).
http://www.oksijen.com/pr_ms_ems.html

Openwave
Produces a MMSC comes that with some prebuilt MMS applications such as Personal Inbox and Album.
http://www.openwave.com/us/products/messaging_products/multimedia_messaging_service_center/