I use the endpoints in both my living room and bedroom to stream media from the Twonky media server installed on the Western Digital 4Tb NAS. The Twonky server and both the Xbox and PS3 endpoints use DLNA for this.My IP camera uploads images to the WD NAS upon motion detection and keeps a watchful eye over my garden shed. Alerts are also sent remotely to my WP7 handheld device for when i'm not at home.
The DDWRT firmware on my Linksys router allows IPSEC VPN setup and dynamic DNS updates for easy and secure remote access.