(im using debian squeeze)
i tried catdvi (but its unacceptable – just a lot of ‘?’s)
now i am using tex4ht but its awfully sloow..
for example generating html for this : 
takes ~2 seconds (thats 4+ times slower than generating the image !!!)
- is there something wrong with my config or is tex4ht really that slow?
- (i doubt theres something wrong with my config) are there any other(FAST) reliable tex2html converters?
As already suggested, if you want equations in a web page, MathJax will process TeX math code into proper math display.