a second vote for augment crystals - fieldslaying proved very popular, aligned good and +1d6 dmg? in a "raid on the hells" arc the party had 3 in use.
Badge of valor? - its part of a set, but it adds +1 to bardic inspire courage for approx 2k, add it to the spell "insperational boost" and 'song of the heart' feat make inspire courage a powerhouse.
Best movement item I found was the chronocharm that 1/day allows a 1/2 move as an immediate action that did not provoke AoO's. Priceless for a PC beguiler, it was used nearly every session, for virtually nothing. The Chronocharm that allows a standard action monster summoning would have been great as well, but the beguiler was collecting the set, and never had it individually identified.