The good news is that for those series that were already completed, it's not TOO hard (yet) to find copies of the volumes (at least, that's what I've found).
And I've noticed a few other titles are SLOWLY being picked up- of course, it's the more popular ones. Alice in the Country of Hearts was picked up by Yen, and Right Stuf has partnered with the former Tokyopop to release a somewhat limited amount of the next volume of Hetalia, as well as reprint the first two volumes.
So hopefully other series will begin getting picked up as well. However, I noticed there were a few Tokyopop series that, even while they were around, just seemed to float off into neverland. Anyone else notice this? Like Immortal Rain. Loved that series to death, but Tokyopop just.....stopped XD