I have the Sony Cybershot T5 myself and added a 2 Gig mem card to give me about 25 minutes of video. For home movies and web posting video clips, it works great and fits in my pocket.
Here is a quote from "Letsgodigital.com" ..a digicam review site.
"Memory Stick PRO Duo - High speed storage
With the new Sony Cybershot DSC T5 digital camera, you not only get the still image but the video too. With an optional Memory Stick PRO Duo media card, shooting high-quality video is simple. MPEG-VX fine mode lets you record MPEG video with 640x480 pixel resolution at 30 frames per second, up to the capacity of the media card. A 1-gigabyte Sony Memory Stick card can hold up to 12 minutes of VGA-quality 640 x 480 MPEG video and 384, 5-megapixel JPEG Fine images"
Everything has tradeoffs, but portability was my main concern.