jSOAP is designed for mobile devices which runs a J2ME platform. With jSOAP you can deal with a webservice using SOAP. jSOAP is very usefull when you don't now before the application starts how is structured the webservice. No need of WSDL !
rmoblog is a platform independent mobile blogging system. You can blog from your mobile (a j2me program) to JSP and PHP websites. With SOAP (Simple Object Access Protocol),client can perform multi-types and multiple blog entries.