LL are taking steps to support script memory limits per avatar and per parcel:
http://wiki.secondlife.com/wiki/User:Babbage_Linden/Office_Hours/2009_03_18
While this is likely to raise serious problems for a minority of SL residents, probably including me, I see this as an important step to making the SL experience more robust and reliable for everyone. Furthermore, LL are taking a careful phased approach which should help to minimize broken content during the transitions.
The good part is that it will kill makers of super lag inducing content, like hair with hundreds of prims and a script in each prim. Well, it'll force them to choose a more sensible architecture. That's just one example, and I'm sure there are others.
Objects with pose menus tend to take a lot of memory. For typical users with a couple pieces of furniture on a small plot, hopefully the limits wouldn't be exceeded. But owners of stores with scores of these items are likely to have problems.
Sex HUDs are also memory users, and depending on the per-avatar limit, many of these might be rendered unusuable.
I'm interested in discussing this issue and trying to help LL do the best job of making this work with the minimum of disruption. Here's your chance to be proactive and help LL avoid problems. One of the most popular statements in these forums is that LL should be working to make SL more robust and less laggy. IMHO, this is a significant step in that direction.
I posted this here in RA rather than Scripting Tips because the issues and ramifications impact all residents, not just scripters.

