The HS2000 and the XD-9 both came out after the AWB, so there are no "true" full-caps available, except LEO magazines (which SA will switch out full-caps for the 10 rounders if you have proof of LEO status ...IIRC). SA was pushing some modded Bretta 92 magazines for a while, and the XD could use just about any all metal double stack pistol magazine, Sig, bretta, S&W 59/69...
The XD-40 magazines are VERY close to the same but hold a full 15 rounds of 9mm. They also, like glock, work in the subcompact sized pistol, while sticking out some. Supposedly the .40 Sub mags will hold a full 10 rounds of .40... so maybe, just maybe I'll have a 15 round Subcompact 9mm soon... I think the LEO cap magazines listed on SAs website list the 9mm Sub as holding 12+1, and the regular size being 15+1.
Someone over on HS2000talk.com had some pics of and claimed to have an XD-40 Sub... not photo shopped or anything, and claiming a full 10 rounds of .40 fit in the magazine. I think its a pre production dealer sample... but SA is rumored to be bringing the Sub 40 out within the next few months, so who knows.
I'm not a big fan of the .40 S&W round, but obviously it works for MANY people. I want a Duty (4") size and a Tactical (5") 9mm to go with my Sub... Someone also said they want a .45... and 10mm...
A 10mm Tactical size in a drop leg holster would BE(!!) my backpacking gun... if they made one.
I picked up the XD-9 Sub back midsummer, and have shot it a bit (maybe 1k rounds?). I LOVE it and its my CCW. I almost bought a Glock 26, but the XD's ergonomics, trigger, and sights appeared better. The finish dosnt bother me... some people have had rust problems, but I only had a little bit of rust show up on the cuts on the slide after riding my hip all day in a cheap nylon IWB hoslter while hiking for 12 hours one day last summer. Little oil and a soft cloth and it was gone. I think the only thing Glock has over the XD is the tenifer finish. I think an XD with Armory coat, or other synthetic finish would beat a Glock hands down.
BTW: ignore my horrible grammar and long run on sentances...