baur is right
Do what Baur said to enable telnetd. There are times when it is necessary...like from work where the ssh port in their firewall isn't open to you and the telnet port is. That being said... let me ask you another question?
When you say you want to run a Mac OSX application remotely... do you mean that you simply want to fire up a UNIX based application on a remote terminal, or are you expecting to be able to run an app like Photoshop or Quicktime and have its output graphics displayed on your Slolaris 8 box?
If you are trying to do the later, well, you can't. Unless its an X11 based application like the Gimp or Xeyes, the program cannot be executed on one machine and be displayed on the other...Unless you are using a remote desktop app like VNC or Timbuktu.
Does this answer your question?
Titanium Powerbook 550