Actually, I should re-state:
I've not had any volume issues using the speakerphone for calls, and the speaker for multimedia (music, movies/videos), but...
I have noticed that videos recorded on the MT4G and on apps such as Tango, the volume is sometimes insufficient even at max setting.
I may try the LVH if it's in the Market and see if it works. Nice to have options, at least.
myTouch 4G/HTC Glacier (Black)
HBoot: 0.85.2007 (PD1510000)
Recovery: ClockworkMod 220.127.116.11
Current ROM: Virtuous Fusion MT4G :: GingerSense 3.0/3D
Tested: CM6.1 Alpha+gr8gorilla's OC+DarkFroyo; Iced Glacier, eViL's 4G-Z, CM7, RoyalGinger, RoyalGlacier