Mac Maintenance - hidden desktop files

So I'm trying to get more life out of my PowerBook G4, and I only have 6.33G of 74.41G disk space free (8.5%).

Where's all the stuff?

12:03 PM 3016 > du -k -d 1 | sort -n -r
60046424        .
53814684        ./Music
4304660 ./Desktop
1553812 ./Library
165748  ./Documents
116480  ./Pictures
54708   ./Projects
34856   ./FontExplorer X
940     ./.Trash
72      ./.razorsql
20      ./.subversion
16      ./Movies
12      ./bin
12      ./.transmission
8       ./Shared
8       ./Public
8       ./NIVdlj0508-0623.fpbf
4       ./.ssh
4       ./.config
0       ./TheVolumeSettingsFolder
0       ./Network Trash Folder

The huge amount of storage in Music I'm not surprised by, but what's that 4.3G in the Desktop folder?

12:03 PM 3017 > ls -l Desktop/
total 93536
drwxr-xr-x   11 steve  steve       374 Apr  3 09:57 08-03
-rw-r--r--    1 steve  steve    779925 Mar 28 10:28 4_findings.pdf
-rw-r--r--    1 steve  steve  18585738 Mar 20 11:04 MPlayerOSX_1.0rc1.dmg
-rw-r--r--    1 steve  steve     60164 Mar 21 15:53 Picture 1.png
-rw-r--r--    1 steve  steve     68683 Mar 26 17:55 Picture 2.png
-rw-r--r--    1 steve  steve    206265 Mar 21 13:35 T2 Brief March 2008.pdf
-rw-r--r--    1 steve  steve   3469366 Mar 21 13:49 access31.pdf
-rw-r--r--    1 steve  steve  24706623 Mar 20 11:06 vlc-0.8.6e.dmg

OK, so I have 40M of disk image files. That still leaves 4G unaccounted for!

12:14 PM 3019 > ls -al Desktop/
total 93672
drwx------   22 steve  steve       748 Apr  2 08:15 .
drwxr-xr-x    3 steve  steve       102 Jul  3  2005 .$$ StuffIt Temp 1120423723
drwxr-xr-x    3 steve  steve       102 Nov 16  2006 .$$ StuffIt Temp 1163745308
drwxr-xr-x    3 steve  steve       102 Dec 27 19:14 .$$ StuffIt Temp 1198811673
drwxr-xr-x    3 steve  steve       102 Dec 27 19:19 .$$ StuffIt Temp 1198811989
drwxr-xr-x    3 steve  steve       102 Dec 28 19:56 .$$ StuffIt Temp 1198900615
drwxr-xr-x    3 steve  steve       102 Dec 28 19:57 .$$ StuffIt Temp 1198900637
drwxr-xr-x    3 steve  steve       102 Dec 28 19:57 .$$ StuffIt Temp 1198900669
drwxr-xr-x    3 steve  steve       102 Dec 28 19:58 .$$ StuffIt Temp 1198900722
drwxr-xr-x   41 steve  steve      1394 Apr  3 11:30 ..
drwxr-xr-x    3 steve  steve       102 Jun 26  2005 .BAHtemp-1363-1804289383
drwxr-xr-x    3 steve  steve       102 Apr 28  2005 .BAHtemp-366-1804289383
-rw-------    1 steve  steve     67588 Apr  3 11:44 .DS_Store
-rw-r--r--    1 steve  steve         0 Mar 17  2005 .localized
drwxr-xr-x   11 steve  steve       374 Apr  3 09:57 08-03
-rw-r--r--    1 steve  steve    779925 Mar 28 10:28 4_findings.pdf
-rw-r--r--    1 steve  steve  18585738 Mar 20 11:04 MPlayerOSX_1.0rc1.dmg
-rw-r--r--    1 steve  steve     60164 Mar 21 15:53 Picture 1.png
-rw-r--r--    1 steve  steve     68683 Mar 26 17:55 Picture 2.png
-rw-r--r--    1 steve  steve    206265 Mar 21 13:35 T2 Brief March 2008.pdf
-rw-r--r--    1 steve  steve   3469366 Mar 21 13:49 access31.pdf
-rw-r--r--    1 steve  steve  24706623 Mar 20 11:06 vlc-0.8.6e.dmg

Errrk! What are these hidden StuffIt Temp directories??

12:19 PM 3022 > du -k -d 1 Desktop/ | sort -nr
4304660 Desktop/
3985408 Desktop//.$$ StuffIt Temp 1198811989
113664  Desktop//.$$ StuffIt Temp 1198811673
83616   Desktop//.BAHtemp-1363-1804289383
57680   Desktop//.BAHtemp-366-1804289383
4236    Desktop//.$$ StuffIt Temp 1198900722
4236    Desktop//.$$ StuffIt Temp 1198900669
4236    Desktop//.$$ StuffIt Temp 1198900637
2448    Desktop//08-03
1536    Desktop//.$$ StuffIt Temp 1163745308
592     Desktop//.$$ StuffIt Temp 1198900615
172     Desktop//.$$ StuffIt Temp 1120423723

12:21 PM 3024 > du -k -a Desktop/.\$\$\ StuffIt\ Temp\ 1198811989/
3985408 Desktop/.$$ StuffIt Temp 1198811989//mencoder
3985408 Desktop/.$$ StuffIt Temp 1198811989/

12:21 PM 3025 > ls -al !$*
ls -al Desktop/.\$\$\ StuffIt\ Temp\ 1198811989/*
-rw-r--r--   1 steve  steve  4081057792 Dec 27 22:04 Desktop/.$$ StuffIt Temp 1198811989/mencoder

Wow! Removing those bumps my free space up to 10.39G! (14%) Nice.