I know that in the latest update MightyMike did some tweaks to GWES to keep it from gradually memory leaking over time. This is great news as with Sense 2.5 apparently loading a crapload of bitmaps, memory can be at a premium at times.
I applied a GWES tweak (bascially the 6.5.5 GWES) to address this issue and noticed a net gain of about 10MB compared to previous values after heavy use. Awesome.
http://forum.xda-developers.com/showthread.php?t=548597
So here's my question. Does the latest ROM update do anything else to help lower RAM consumption? I'm still debating whether or not I want to upgrade and reload everything. If the GWES update in the latest update is just the GWES update I've already applied, I might hold off. But if people are seeing like 90MB free with Sense+CHT loaded, I will jump on the upgrade!
(Just FYI, I have about 70MB free on a clean boot, and tend to see about 50-60MB after a few days of use and then closing all running apps -- the difference is probably just due to file caching and so forth filling up after time, which hasn't happened yet on a fresh boot; I don't think there is a leak.)