Saving svn changes for use in another computer? or backup uncommitted svn changes

If you want to just show them the changes that they can apply, you could create a patch.

svn diff > patchfile

If you've already committed, you can create a patch between different revisions.

For example, to create a patch of changes from 341 to the last revision:

svn diff -r 341:HEAD http://svn.example.com/repos/calc/trunk > patchfile

Sure, use svn diff to grab a copy:

svn diff >modifications.patch

This creates a "patch" file that you can later move to another computer and apply there:

patch -p1 <modifications.patch

Note that if the remote computer has a working copy for a different revision of the Subversion repository, you may have conflicts when applying the patch. The patch program has a different process for resolving conflicts than Subversion itself.

If you are not confident in committing to the trunk, you can create a branch and commit there, and tell the other developers to check out that branch to review your changes.
When everything is ok you can then merge it to the trunk.