[IDEA] Tweaks

[namtih]

I only have some limited basic Linux skills and knowledge. So I want to ask you what you think would make sense to implement in future releases:
http://blog.extremeshok.com/archives/1081

I've implemented the following tweaks yesterday and all seems running fine. But I don't have/know any tools to check if there is a real performance gain.
- Dropbear
- Remove tty + getty (3-6)
- Replace Bash with Dash shell
- Optimize mount (often recommended in other threads too)
- Disable IPv6
- Replace Deadline Scheduler with NOOP Scheduler (I found some articles about NOOP and it was always recommended for flash drives like SD cards)
- Remove DHCP

I've also did:
- remove Samba binaries
- sync && sync && echo 3 > /proc/sys/vm/drop_caches

While looking for a new ROM for my Android device, I've also saw many scripts which should optimize the general performance of the device. Many are editing read caches, swap behavior, TCP tweaks and so on. But these settings are to unknown for me to see if it really would help and what are the best settings for the Pi. Here is for example one script:
http://forum.xda-developers.com/showthread.php?p=17870162&postcount=1
or
http://forum.xda-developers.com/showthread.php?t=1904438
Some is Android specific, but many tweaks are just basic Linux.