The SWARL thing has been around for a few years now (started in 2002 I think), but it is still a relative newcomer. Kind of a rework of the old WR0 (1950's), WPE (1960's) and WDX (started in 1970) Monitor Services registration and certificate program. However, I like the format of the old system better, the IDs (example WR0BJS / WPE2BJS / WDX2BJS) just look more "right" to me than something like WA2081SWL. And at one time you had to prove reception of at least 5 SW stations with one outside your borders to get the certificate.
By the way, the old WDX Monitor Service registration still exist, you can still get a WDX ID and the printed certificate. However, they do not have a web page and only do it via snail mail as far as I know.
In my case my WDX registration and my W6 callsign have the same suffix, my initials, and the ham license (vanity call selected in 2007 when I finally talked myself into giving up my long held sequentially assigned one) and the WDX Monitor Certificate (that I got in the early 1970's) are framed next to each other.
Yeah, it don't mean a thing, but it is still neat....to me.
T!