Yeah, 64kb for mono scripts, but I assume that their datatypes also take more space.
Anyways, no, mono, havok 4 and web on a prim won't be released at the same time.
Havok 4?
The estimated grid-wide release is in..8 days. Yep, you read that right, around the 25th to 26th if all goes by scedule. Date can be gotten from the latest Havok 4 office hour transcript (from the 11th) on the
SL wiki.
Mono?
Well, no idea yet. As one of the previous posts have shown, they're not quite sure -when- to go for a release milestone.
Web on a prim is already in the RC, tho very very rudimentary. I hate the fact it's a parcel setting..IMO anything but the music should be a per-prim setting, and just be secured with a yes/no/Mute blue dialog along the lines of 'x wants to show y on its face'
Web on a prim final is sceduled for May, if I recall correctly, so I assume they'll put some more work into it.