SVG's mertis versus SMIL and Flash5

Has anyone thoughts about the relative merits of the rival technologies: SVG, 
SMIL, Flash5? I am interested in expressed views.

I have written demos using all of these technologies, now, and have found the 
following:

1. SVG has good interactive features, but limited audio (no streaming) and 
security (source code is visible). 

2. SMIL has very limited interactive features (proof: Realnetworks promo for 
SMIL is written in Flash5!), but good audio features and security.

3. Flash5 has good security, audio and interactive features, but is expensive 
and is not a programming language, and therefore we are limited to 
developments at Macromedia.

Thank you.