procps-3.0.1 --> procps-3.0.2

top defaults to the old layout
top defaults to sorting by %CPU
fix top for non-SMP 2.2.xx and 2.0.xx
new "make install" fixed
vmstat -a fixed
vmstat compiles with latest gcc-3.x
vmstat does 64-bit time

procps-3.0.0 --> procps-3.0.1

sysctl handles net/ipv4/conf/eth1.0123/tag (VLAN interface)
sysctl handles net.ipv4.conf.eth1/0123.tag (VLAN interface)
"ps" is now about 2x faster than in procps-2.x.x
"ps -F" now documented
w works in KOI8-R locale
vmstat documentation update
"skill -n blah blah blah" lets you test options
simple "make && make install" now

procps-2.x.x --> procps-3.0.0

designed to support Linux 2.0 through 2.5.41 and beyond
new top, with optional: color, windowing, SMP stats
runs faster
more "it crashes" bugs fixed
top shows IO-wait time
vmstat can show active/inactive memory stats
real-time info supported in ps
correct "ps -o size" and "ps --sort size"
new maintainers
reduced memory usage for ps
allow large PIDs to be specified
SELINUX support is just a recompile away
the "F" column shrank, so "ps -l" has more command name room
64-bit time reduces the overflow problem
support S/390, IA-64 emulator, and user-mode Linux
oldps is gone
configure script -- use "make -f Makefile.noam" as a backup
"w" program better at determining what a user is doing
more stable
code at http://procps.sf.net/ now (SourceForge)

Earlier changes, for those not using Debian already:

more stable
runs faster
-F format option
better error reporting in ps for unknown format specifiers
BSD's sysctl options -b and -X
top displays well on large-memory systems
old BSD-style select-by-PID ("ps l$$")
15-character user names
ps 'f' ASCII art forest fixed
add SIGSYS on i386
top reports real RSS value
large-memory systems work
minimal ps program for embedded systems (minimal.c)
BSD personality process selection fixed
support locale (French) with ',' and '.' mixed up
pgrep program
includes the "kill" and "nice" programs
don't chop non-tty ps output at 80 columns