I tried installing xvkbd from the command line but got:

Nokia-N800-50-2:/media/mmc1/Folder/Installs# dpkg -i xvkbd_2.8-1_armel.deb
Selecting previously deselected package xvkbd.
(Reading database ... 18702 files and directories currently installed.)
Unpacking xvkbd (from xvkbd_2.8-1_armel.deb) ...
dpkg: dependency problems prevent configuration of xvkbd:
xvkbd depends on libxaw7; however:
Package libxaw7 is not installed.
xvkbd depends on libxmu6; however:
Package libxmu6 is not installed.
xvkbd depends on libxpm4; however:
Package libxpm4 is not installed.
dpkg: error processing xvkbd (--install):
dependency problems - leaving unconfigured
Errors were encountered while processing:
xvkbd

Update:
entered red-pill mode
installed libxaw7 which looked to also install libxmu6 and libxpm4
reinstalled as above and it worked