A standalone installation of the designer tool is on the roadmap.
Correct, but this is nothing more than eclipse with lots of menu options turned of and e.g. a fixed perspective
It may be possible to embed the business analyst GPD eclipse perspective inside a frame of my application, or I might prefer the standalone installation designer tool to be embedded (from user guide).
Emded the GPD in a webbrowser? hmmm..... I would rather use webstart e.g. to install it. I would never try to run the gpd in a webbrowser...
Is there any recent information on when either of those will be available?
No. No effort is put into this. GPD has to be more complete first.
Can the GPD eclipse perspective for business analysts be thought of as an SWT? Can it be embedded in a java application such as an SWT using JWS?
An SWT? Eclipse is based on SWT, but a lot more... Embed it in a java application using JWS (Java WebStart?) I never new JWS can be used to 'embed' things. It's a web based way of downloading/installing/starting apps...
it is well suited for your needs.
'A' GPD in a browser is not that impossible to accopplish, but do not underestimate the amount of work it takes to develop a good full functional graphical designer for jPDL. Converting what mxgraph has done (which is btw really impressive) will probably leave lot's of open issues (jBPM/JPDL-ish is not JPDL). But I did not try, so I can only speculate.