The only problem I see with what you have done with the matrix themes is that the green etxt is harder to see with the code all over the background.
I would suggest that the actual “post” boxes as in where your posts are, would just have a black background. The matrix code would go all over the rest of the page.
Frozen Dreams looks cool by the way I would change the face that is on the right and add a matrix pic there but everyone likes different things.
Hmm I may do that, i have edited a few blog designs in the past but I am unsure about css and stuff….
As for fonts how would I type in the matrix font for example and the person reading it would see it in the matrix font. If they had it of course but if they didnt would I be able to tell the blog what font to use?