Buck Hodges from Microsoft blogged about all the possible links you can construct to point to TSWA pages.
For example the following URL opens the Work Item Editor:
Open the existing work item with ID 1234: http://mytfs:8090/wi.aspx?id=1234
To make it simple I created a small tool that helps you construct those URLs in an easy way:
You can download the source from here:
File Attachement: WebAccessLinkCreator.zip
TSWA really needs something like this built directly into the web page :/