I've had one WSOD that was resolved fairly quickly, other than that I keep finding more and more apps to expand the 770's usefulness!
My apps currently:
# PIM
1. GPE PIM Application Suite For Maemo
2. gpesyncd
5. Xournal
6. LeafPad

# Accessories
1. Evince Document Viewer
6. Osso Xterm
8. SDict Viewer
14. Maemochron

# Education
3. Maemo Stars

# Statusbar and home applets
2. Clock applet
5. CPU/Mem/Screenshot applet with run command
6. IpHome homepage-plugin
7. Additional Maemo Internet Search Engines

# GUI networking applicationsr
6. Grsync
8. Minimo/Mozilla Web Browser
10. SpotYah

# Multimedia
1. Media Streamer
5. Ogg Vorbis Player
8. Streamtuner (maemo port)
9. Maemo Recorder
10. MPlayer

# Graphics
1. Horizon

# Games
1. Battlegweled
5. Crazyparking
6. Crimson Fields
11. IceBreaker
13. La Pulga
15. MaemoBlocks
16. MaemoDrac
17. MaemoSweeper
21. Pipepanic
24. Reverzi
25. ScummVM
30. TuxPuck
32. Vectoroids
33. Xbill Maemo

# Command Line tools
3. Bash: GNU Bourne-Again Shell
17. becomeroot
26. sqlite3
27. pysqlite2

# Command line Networking tools
2. Dsniff
5. kismet
8. Ntpdate: set clock from a NTP server
11. OpenSSH Server and client
16. rsync
17. unison
18. wget
22. Nmap, the port scanner

# Programming
1. Python

# System Tools
1. Maemo Process Viewer
2. Task Manager

# Office Applications
1. Gnumeric Spreadsheet