hi,
yes, ive got a ti working with my alpha, and think its a great combination :)
you have to try different usb port combinations as ti is quite sensitive to usb bus sharing.
ive got my basestation into an external usb hub, and the ti into my mac directly, but other combinations worked too.
stuck notes, could be you need to set decimination - the harp sends alot of data.
i notice this particularly when using poly midi ( which i use to get per note expression on ti, by sending each note to separate patch)
the tricky part of TI integration with EigenD is that VC can only be loaded once, but this can be worked around by some rewiring in workbench.
eg ive got it now, so i can use TI as both synth and fx unit ( for eigend/other vsts) at once ( ie via 'input signals')
one thing ive not done yet, but will, is to allow different splits to go to different ti parts.
btw,
i only tend to use in 'live' mode, seems less latency, and take care with usb audio ... if your using headphones into harp you could easily overload usb (clicks/pops) , my plan is to get a firewire audio interface to use for virus output to help this.
btw, you will also find interesting eigenharp things over at g+... my projects i usually release there first :)
https://plus.google.com/s/eigenharp/communities
good luck and enjoy :)