hi Matt, I like it overall, although I think it works better for the Irish, than the Latin. did you start with spacing the font, I would like to see more proofs of onohoaobo OHOAOBOCO etc. i think getting the spacing and the proportion nailed down first will go a long way. some first comments, the Caps look very tall in relation to the lowercase, and the proportions are quite narrow C E for instance. overall caps and lowercase, the proportions are narrow, but that may be what you wanted.the cap A, looks not well enough defined, the loop could be less subtle and a bit higher, same for lowercase a, accents are too high, and the fatha, looks weak. top left of T and t, the spur is not long enough to the left.... lowercase g seems a bit awkward in weight distribution. anyway hope these are useful comments for you. I am sure you have seen it, but if not, the book Irish Type Design, by Dermot McGuinne is an invaluable reference, and a spiffy read ( I read it on the ferry to England many moons ago...
anyone making Webfonts that will be viewed/read on lower resolution screens, should invest time in learning about Hinting, as well as doing. Much of the hinting that was done in the past for black and white rendering, for controlling spacing, symmetry, diagonals, and deltas for perfect diagonals is no longer needed. Its all discussed here, in this longer thread.
both VTT and TTF Autohint are both great tools to use to get a head start on hinting fonts for the screen. Autohinting does not take care of the details, however, and proofing and fine tuning must be done, to get the details right, and of course as with everything in type design, the details are important. Accents are a good example of where hinting may need fine tuning, at small sizes. & and Cap Q, are other examples of characters that Autohinters find difficult to get right on first pass.
there is a sample font that ships with VTT 6.10 that can be studied. I would also recommend taking a look at this brilliant font hinting exercise using TTFAutohint. (a labour of love)
Hinting is not as scary as it was, but the details still need careful attention. do it once, do it right and your readers will thank you. Hinting for FV fonts, may be easier still, by hinting one master, with a basic set of controls, all font variations can use this one set of basic hinting controls.